  
  
  [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),
  ((https://homalg-project.github.io/homalg_project/homalg/)).
  
  [[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,
  ((https://www.algebra.mathematik.uni-siegen.de/barakat/eaca/homalg_eaca06.pdf)).
  
  
  
  [32X
