@article{02221852, title = {Minimal surface representations of virtual knots and links.}, journal = {Geometry \& Topology}, volume = {5}, year = {2005}, pages = {509-535}, doi = {10.2140/agt.2005.5.509}, zbl = {1083.57007}, language = {en}, url = {http://dml.mathdoc.fr/item/02221852} }
Dye, H.A.; Kauffman, Louis H. Minimal surface representations of virtual knots and links.. Geometry & Topology, Tome 5 (2005) pp. 509-535. doi : 10.2140/agt.2005.5.509. http://gdmltest.u-ga.fr/item/02221852/