  
  
  [1XReferences[101X
  
  [[20XBar[120X] [16XBarakat, M.[116X, [17XSpectral Filtrations via Generalized Morphisms[117X, [18X[118X, [19X[119X, (), , ((arxiv.org/abs/0904.0240)).
  
  [[20XBar10[120X]           [16XBarakat,           M.[116X,           [17XThe           homalg           package          --          GAP4[117X          (2007-2010),
  ((http://homalg.math.rwth-aachen.de/index.php/core-packages/homalg-package)).
  
  [[20XBR06[120X]  [16XBarakat,  M.  and  Robertz, D.[116X, [17Xmathtthomalg: First steps to an abstract package for homological algebra[117X, in Proceedings of the X
  meeting     on     computational     algebra    and    its    applications    (EACA    2006),    Sevilla    (Spain)    (2006),    29--32,
  ((http://homalg.math.rwth-aachen.de/maple/homalg_eaca06.pdf)).
  
  
  
  [32X
