Enumerating the orientable 2-cell imbeddings of complete bipartite graphs
Bruce P. Mull · Journal of Graph Theory · 1999
A formula is developed for the number of congruence classes of 2-cell imbeddings of complete bipartite graphs in closed orientable surfaces. © 1999 John Wiley & Sons, Inc. J Graph Theory 30: 77–90, 1999