%0 Journal Article
%A Seyed Naser Hosseini
%A Walter Tholen
%A Leila Yeganeh
%T Lax pullback complements and pullbacks of spans
%J Theory and applications of categories
%D 2018
%P 445-475
%V 33
%I mathdoc
%U http://geodesic.mathdoc.fr/item/TAC_2018_33_a15/
%G en
%F TAC_2018_33_a15