@article{TRSPY_2006_252_a10,
     author = {L. H. Kaufman and V. O. Manturov},
     title = {Virtual {Knots} and {Links}},
     journal = {Informatics and Automation},
     pages = {114--133},
     publisher = {mathdoc},
     volume = {252},
     year = {2006},
     language = {ru},
     url = {http://geodesic.mathdoc.fr/item/TRSPY_2006_252_a10/}
}