%0 Journal Article
%A Neeman, Amnon
%A Retakh, Vladimir
%T Extension categories and their homotopy
%J Compositio Mathematica
%D 1996
%P 203-242
%V 102
%N 2
%I Kluwer Academic Publishers
%U http://www.numdam.org/item/CM_1996__102_2_203_0/
%G en
%F CM_1996__102_2_203_0