TY  - BOOK
TI  - Lusternik-Schnirelmann category
SN  - 9781470413309 (online)
PY  - 2003///
CY  - Providence, R.I.
PB  - American Mathematical Society
UR  - http://www.ams.org/surv/103 | http://dx.doi.org/10.1090/surv/103
ER  -