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@article{MASLO_1984__34_3_a12, author = {\v{S}ir\'a\v{n}, Jozef}, title = {On a problem of {P.} {Erd\"os}}, journal = {Mathematica slovaca}, pages = {337--340}, publisher = {mathdoc}, volume = {34}, number = {3}, year = {1984}, mrnumber = {756992}, zbl = {0612.05032}, language = {en}, url = {http://geodesic.mathdoc.fr/item/MASLO_1984__34_3_a12/} }
Širáň, Jozef. On a problem of P. Erdös. Mathematica slovaca, Tome 34 (1984) no. 3, pp. 337-340. http://geodesic.mathdoc.fr/item/MASLO_1984__34_3_a12/