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@article{MASLO_1984__34_4_a3, author = {Zelinka, Bohdan}, title = {Semidomatic numbers of directed graphs}, journal = {Mathematica slovaca}, pages = {371--374}, publisher = {mathdoc}, volume = {34}, number = {4}, year = {1984}, mrnumber = {775244}, zbl = {0602.05038}, language = {en}, url = {http://geodesic.mathdoc.fr/item/MASLO_1984__34_4_a3/} }
Zelinka, Bohdan. Semidomatic numbers of directed graphs. Mathematica slovaca, Tome 34 (1984) no. 4, pp. 371-374. http://geodesic.mathdoc.fr/item/MASLO_1984__34_4_a3/