TY  - JOUR
AU  - Luis Montejano
TI  - A Quick proof of Singhof's cat (M x S1) = cat (M) + 1 theorem.
JO  - Manuscripta mathematica
PY  - 1983
SP  - 49
EP  - 52
VL  - 42
PB  - mathdoc
UR  - http://geodesic.mathdoc.fr/item/MM2_1983__42_154921/
ID  - MM2_1983__42_154921
ER  -