TY  - DATA
AU  - Murasugi, Kunio
AU  - Przytycki, Jozef,
TI  - An index of a graph with applications to knot theory 
T2  - Memoirs of the American Mathematical Society, 
SN  - 9781470400859 (online)
PY  - 1993///
CY  - Providence, R.I.
PB  - American Mathematical Society
UR  - http://www.ams.org/memo/0508
ER  -