TY  - BOOK
AU  - Manturov, Vassily Olegovich
AU  - Iiyutko, Denis Petrovich
TI  - Virtual knots: the state of the art
SN  - 9789814401128
U1  - 514.2242 
PY  - 2013///
CY  - Singapore
PB  - World Scientific
KW  - Knot theory
ER  -