  
  
  [1XReferences[101X
  
  [[20XBar09[120X]   [16XBarakat,   M.[116X,   [17XThe   homalg   package   --   GAP4[117X   (2007-2009),
  ((http://homalg.math.rwth-aachen.de/index.php/core-packages/homalg-package)).
  
  [[20XBGKLH08[120X]  [16XBarakat,  M., Görtzen, S., Kirschmer, M. and Lange-Hegermann, M.[116X,
  [17XGAP              Package             RingsForHomalg[117X             (2007-2008),
  ((http://homalg.math.rwth-aachen.de/index.php/core-packages/ringsforhomalg)).
  
  [[20XBR08[120X] [16XBarakat, M. and Robertz, D.[116X, [17Xhomalg -- A Meta-Package for Homological
  Algebra[117X, [18XJ. Algebra Appl.[118X, [19X7[119X, 3 (2008), 299--317, ((arXiv:math.AC/0701146)).
  
  [[20XGör08a[120X]    [16XGörtzen,    S.[116X,    [17XGAP   Package   GaussForHomalg[117X   (2007-2008),
  ((http://wwwb.math.rwth-aachen.de/goertzen/GaussForHomalg)).
  
  [[20XGör08b[120X]      [16XGörtzen,      S.[116X,     [17XGAP     Package     SCO[117X     (2007-2008),
  ((http://wwwb.math.rwth-aachen.de/goertzen/SCO)).
  
  [[20Xht09[120X]    [16Xhomalg    team,    T.[116X,    [17XThe    homalg    project[117X    (2003-2009),
  ((http://homalg.math.rwth-aachen.de/)).
  
  [[20XLN08[120X]  [16XLübeck,  F.  and  Neunhöffer,  M.[116X,  [17XGAP  Package GAPDoc[117X (2007-2008),
  ((http://www.math.rwth-aachen.de/~Frank.Luebeck/GAPDoc)).
  
  [[20XMP99[120X]  [16XMoerdijk,  I.  and Pronk, D. A.[116X, [17XSimplicial cohomology of orbifolds[117X,
  [18XIndag. Math. (N.S.)[118X, [19X10[119X, 2 (1999), 269--293.
  
  
  
  [32X
