@article{GDZPPN002442280, title = {Minimally knotted embeddings of planar graphs.}, journal = {Mathematische Zeitschrift}, volume = {212}, year = {1993}, pages = {653-658}, zbl = {0789.57006}, url = {http://dml.mathdoc.fr/item/GDZPPN002442280} }
Wu, Ying-Qing. Minimally knotted embeddings of planar graphs.. Mathematische Zeitschrift, Tome 212 (1993) pp. 653-658. http://gdmltest.u-ga.fr/item/GDZPPN002442280/