%0 Journal Article
%A Ronald Brown
%A Rafael Sivera
%T Algebraic colimit calculations in homotopy theory using fibred and cofibred categories
%J Theory and applications of categories
%D 2009
%P 222-251
%V 22
%I mathdoc
%U http://geodesic.mathdoc.fr/item/TAC_2009_22_a7/
%G en
%F TAC_2009_22_a7