Motohashi T, Ohyama Y, Taniyama K. Yamada Polynomial and Crossing Number of Spatial Graphs. Rev. mat. complut. [Internet]. 1994 Jan. 1 [cited 2026 Jul. 28];7(2):247. Available from: https://revistas.ucm.es/index.php/REMA/article/view/REMA9494220247A