%0 Journal Article
%A Yin Tian
%T A categorification of the square root of $-1$
%J Fundamenta Mathematicae
%D 2016
%P 89-98
%V 232
%N 1
%I mathdoc
%U http://geodesic.mathdoc.fr/articles/10.4064/fm232-1-7/
%R 10.4064/fm232-1-7
%G en
%F 10_4064_fm232_1_7