@article{MASLO_1987__37_4_a5,
     author = {Zelinka, Bohdan},
     title = {Natural bijections between directed and undirected self-complementary graphs},
     journal = {Mathematica slovaca},
     pages = {363--366},
     publisher = {mathdoc},
     volume = {37},
     number = {4},
     year = {1987},
     mrnumber = {916944},
     zbl = {0659.05051},
     language = {en},
     url = {http://geodesic.mathdoc.fr/item/MASLO_1987__37_4_a5/}
}