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<entry id="GAPDoc"><manual>
  <author>
    <name><first>Frank</first><last>Lübeck</last></name>
    <name><first>Max</first><last>Neunhöffer</last></name>
  </author>
  <title><C>GAPDoc (version 1.6)</C></title>
  <organization>RWTH Aachen</organization>
  <year>2017</year>
  <other type="note">
    GAP package, 
    <URL>http://www.math.rwth-aachen.de/~Frank.Luebeck/GAPDoc/index.html</URL>
  </other>
</manual></entry>

<entry id="GitHubPagesForGAP"><manual>
  <author>
    <name><first>Max</first><last>Horn</last></name>
  </author>
  <title>
    <C>GitHubPagesForGAP - a GitHub Pages generator for GAP packages</C> 
  </title>
  <year>2017</year>
  <volume>0.2</volume> 
  <other type="note">
    GAP package, <URL>https://gap-system.github.io/GitHubPagesForGAP/</URL>
  </other>
</manual></entry>

<entry id="A1"><phdthesis>
  <author>
    <name><first>M.</first><last>Alp</last></name>
  </author>  
  <title>GAP, crossed modules, cat1-groups:
                      applications of computational group theory</title>
  <school>University of Wales, Bangor</school>
  <year>1997</year>
  <type>Ph.{D}.~thesis</type>
</phdthesis></entry>

<entry id="AW1"><article>
  <author>
    <name><first>M.</first><last>Alp</last></name>
    <name><first>C. D.</first><last>Wensley</last></name>
  </author>  
  <title>Enumeration of cat1-groups of low order</title>
  <journal>Int. J. Algebra and Computation</journal>
  <year>2000</year>
  <volume>10</volume>
  <pages>407--424</pages>
</article></entry>

<entry id="AW2"><article>
  <author>
    <name><first>M.</first><last>Alp</last></name>
    <name><first>C. D.</first><last>Wensley</last></name>
  </author>  
  <title>Automorphisms and homotopies of groupoids and crossed modules</title>
  <journal>Applied Categorical Structures</journal>
  <year>2010</year>
  <volume>18</volume>
  <pages>473-495</pages>
</article></entry>

<entry id="B82"><inproceedings>
  <author>
    <name><first>R.</first><last>Brown</last></name>
  </author>  
  <title>Higher-dimensional group theory</title>
  <booktitle>Low-dimensional topology</booktitle>
  <year>1982</year>
  <editor>
    <name><first>R.</first><last>Brown</last></name>
    <name><first>T. L.</first><last>Thickstun</last></name>
  </editor>  
  <volume>48</volume>
  <series>London Math. Soc. Lecture Note Series</series>
  <pages>215--238</pages>
  <publisher>Cambridge University Press</publisher>
</inproceedings></entry>

<entry id="BH1"><article>
  <author>
    <name><first>R.</first><last>Brown</last></name>
    <name><first>P. J.</first><last>Higgins</last></name>
  </author>  
  <title>On the connection between the second relative 
                      homotopy group and some related spaces</title>
  <journal>Proc. London Math. Soc.</journal>
  <year>1978</year>
  <volume>36</volume>
  <pages>193--212</pages>
</article></entry>

<entry id="brow:hig:siv"><book>
  <author>
    <name><first>R.</first><last>Brown</last></name>
    <name><first>P. J.</first><last>Higgins</last></name>
    <name><first>R.</first><last>Sivera</last></name>
  </author>  
  <title>Nonabelian algrebraic topology</title>
  <publisher>European Mathematical Society</publisher>
  <year>2011</year>
  <volume>15</volume>
  <series>Tracts in Mathematics</series>
</book></entry>

<entry id="brow:lod"><article>
  <author>
    <name><first>R.</first><last>Brown</last></name>
    <name><first>J. -L.</first><last>Loday</last></name>
  </author>  
  <title>Van Kampen theorems for diagram of spaces</title>
  <journal>Topology</journal>
  <year>1987</year>
  <volume>26</volume>
  <pages>311--335</pages>
</article></entry>

<entry id="BW1"><article>
  <author>
    <name><first>R.</first><last>Brown</last></name>
    <name><first>C. D.</first><last>Wensley</last></name>
  </author>  
  <title>On finite induced crossed modules, 
  and the homotopy <M>2</M>-type of mapping cones</title>
  <journal>Theory and Applications of Categories</journal>
  <year>1995</year>
  <volume>1</volume>
  <pages>54--71</pages>
</article></entry>

<entry id="BW2"><article>
  <author>
    <name><first>R.</first><last>Brown</last></name>
    <name><first>C. D.</first><last>Wensley</last></name>
  </author>  
  <title>Computing crossed modules induced by an inclusion of a normal subgroup,  
with applications to homotopy <M>2</M>-types</title>
  <journal>Theory and Applications of Categories</journal>
  <year>1996</year>
  <volume>2</volume>
  <pages>3--16</pages>
</article></entry>

<entry id="BW3"><article>
  <author>
    <name><first>R.</first><last>Brown</last></name>
    <name><first>C. D.</first><last>Wensley</last></name>
  </author>  
  <title>Computation and homotopical applications 
                      of induced crossed modules</title>
  <journal>J. Symbolic Computation</journal>
  <year>2003</year>
  <volume>35</volume>
  <pages>59--72</pages>
</article></entry>

<entry id="E1"><phdthesis>
  <author>
    <name><first>G.</first><last>Ellis</last></name>
  </author>  
  <title>Crossed modules and their higher dimensional analogues</title>
  <school>University of Wales, Bangor</school>
  <year>1984</year>
  <type>Ph.{D}.~thesis</type>
</phdthesis></entry>

<entry id="ell:st"><article>
  <author>
    <name><first>G.</first><last>Ellis</last></name>
    <name><first>R.</first><last>Steiner</last></name>
  </author>  
  <title>Higher dimensional crossed modules 
                      and the homotopy groups of (n+1)-ads.</title>
  <journal>J. Pure and Appl. Algebra</journal>
  <year>1987</year>
  <volume>46</volume>
  <pages>117--136</pages>
</article></entry>

<entry id="G1"><article>
  <author>
    <name><first>N. D.</first><last>Gilbert</last></name>
  </author>  
  <title>Derivations, automorphisms and crossed modules</title>
  <journal>Comm. in Algebra</journal>
  <year>1990</year>
  <volume>18</volume>
  <pages>2703--2734</pages>
</article></entry>

<entry id="IOU1"><article>
  <author>
    <name><first>E.</first><last>Ilgaz</last></name>
    <name><first>A.</first><last>Odabas</last></name>
    <name><first>E. O.</first><last>Uslu</last></name>
  </author>  
  <title>Isoclinism of crossed modules</title>
  <journal>J. Symb. Comput.</journal>
  <year>2016</year>
  <volume></volume>
  <pages>1--17</pages>
  <note>http://dx.doi.org/10.1016/j.jsc.2015.08.006</note>
</article></entry>

<entry id="JNO"><article>
  <author>
    <name><first>R.</first><last>James</last></name>
    <name><first>M. F.</first><last>Newman</last></name>
    <name><first>E. A.</first><last>O'Brien</last></name>
  </author>  
  <title>The groups of order 128</title>
  <journal>J. Algebra</journal>
  <year>1990</year>
  <volume>129</volume>
  <pages>136--158</pages>
</article></entry>

<entry id="L1"><article>
  <author>
    <name><first>J. L.</first><last>Loday</last></name>
  </author>  
  <title>Spaces with finitely many non-trivial homotopy groups</title>
  <journal>J. App. Algebra</journal>
  <year>1982</year>
  <volume>24</volume>
  <pages>179--202</pages>
</article></entry>

<entry id="M1"><phdthesis>
  <author>
    <name><first>E. J.</first><last>Moore</last></name>
  </author>  
  <title>Graphs of Groups:
                      Word Computations and Free Crossed Resolutions</title>
  <school>University of Wales, Bangor</school>
  <year>2001</year>
  <type>Ph.{D}.~thesis</type>
</phdthesis></entry>

<entry id="N2"><phdthesis>
  <author>
    <name><first>K. J.</first><last>Norrie</last></name>
  </author>  
  <title>Crossed modules and analogues of group theorems</title>
  <school>King's College, University of London</school>
  <year>1987</year>
  <type>Ph.{D}.~thesis</type>
</phdthesis></entry>

<entry id="N1"><article>
  <author>
    <name><first>K. J.</first><last>Norrie</last></name>
  </author>  
  <title>Actions and automorphisms of crossed modules</title>
  <journal>Bull. Soc. Math. France</journal>
  <year>1990</year>
  <volume>118</volume>
  <pages>129--146</pages>
</article></entry>

<entry id="W2"><article>
  <author>
    <name><first>J. H. C.</first><last>Whitehead</last></name>
  </author>  
  <title>On operators in relative homotopy groups</title>
  <journal>Ann. of Math.</journal>
  <year>1948</year>
  <volume>49</volume>
  <pages>610--640</pages>
</article></entry>

<entry id="W1"><article>
  <author>
    <name><first>J. H. C.</first><last>Whitehead</last></name>
  </author>  
  <title>Combinatorial homotopy <C>I</C><C>I</C></title>
  <journal>Bull. Amer. Math. Soc.</journal>
  <year>1949</year>
  <volume>55</volume>
  <pages>453--496</pages>
</article></entry>

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