We give a solution to a part of Problem 1.60 in Kirby's list of open problems in topology, thus answering in the positive the question raised in 1987 by J. Przytycki.
@article{bwmeta1.element.bwnjournal-article-doi-10_4064-fm225-1-6, author = {Sergei Duzhin and Mikhail Shkolnikov}, title = {Bipartite knots}, journal = {Fundamenta Mathematicae}, volume = {227}, year = {2014}, pages = {95-102}, zbl = {1303.57007}, language = {en}, url = {http://dml.mathdoc.fr/item/bwmeta1.element.bwnjournal-article-doi-10_4064-fm225-1-6} }
Sergei Duzhin; Mikhail Shkolnikov. Bipartite knots. Fundamenta Mathematicae, Tome 227 (2014) pp. 95-102. http://gdmltest.u-ga.fr/item/bwmeta1.element.bwnjournal-article-doi-10_4064-fm225-1-6/