TY  - JOUR
AU  - John W. Rutter
TI  - A classification of secondary cohomology operations
JO  - Colloquium Mathematicum
PY  - 1975
SP  - 241
EP  - 243
VL  - 34
IS  - 2
PB  - mathdoc
UR  - http://geodesic.mathdoc.fr/articles/10.4064/cm-34-2-241-243/
DO  - 10.4064/cm-34-2-241-243
LA  - en
ID  - 10_4064_cm_34_2_241_243
ER  -