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@article{CMJ_2000__50_1_a5, author = {Zelinka, Bohdan}, title = {On a problem concerning stratified graphs}, journal = {Czechoslovak Mathematical Journal}, pages = {47--49}, publisher = {mathdoc}, volume = {50}, number = {1}, year = {2000}, mrnumber = {1745457}, zbl = {1033.05035}, language = {en}, url = {http://geodesic.mathdoc.fr/item/CMJ_2000__50_1_a5/} }
Zelinka, Bohdan. On a problem concerning stratified graphs. Czechoslovak Mathematical Journal, Tome 50 (2000) no. 1, pp. 47-49. http://geodesic.mathdoc.fr/item/CMJ_2000__50_1_a5/