TY  - JOUR
AU  - Herrlich, H.
AU  - Ringel, C. M.
TI  - Identities in Categories
JO  - Canadian mathematical bulletin
PY  - 1972
SP  - 297
EP  - 299
VL  - 15
IS  - 2
UR  - http://geodesic.mathdoc.fr/articles/10.4153/CMB-1972-055-0/
DO  - 10.4153/CMB-1972-055-0
ID  - 10_4153_CMB_1972_055_0
ER  -