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@article{MOMA_1976__82_177775, author = {S. Knapowski and P. Tur\'an}, title = {On the {Sign} {Changes} of (...(x) - lix). {II.}}, journal = {Monatshefte f\"ur Mathematik}, pages = {163--176}, publisher = {mathdoc}, volume = {82}, year = {1976}, zbl = {0342.10025}, url = {http://geodesic.mathdoc.fr/item/MOMA_1976__82_177775/} }
S. Knapowski; P. Turán. On the Sign Changes of (...(x) - lix). II.. Monatshefte für Mathematik, Tome 82 (1976), pp. 163-176. http://geodesic.mathdoc.fr/item/MOMA_1976__82_177775/