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@article{MAN_1984__267_163880, author = {Achim Clausing}, title = {P\'olya {Operators} {II:} {Complete} {Concavity.}}, journal = {Mathematische Annalen}, pages = {61--82}, publisher = {mathdoc}, volume = {267}, year = {1984}, zbl = {0533.34025}, url = {http://geodesic.mathdoc.fr/item/MAN_1984__267_163880/} }
Achim Clausing. Pólya Operators II: Complete Concavity.. Mathematische Annalen, Tome 267 (1984), pp. 61-82. http://geodesic.mathdoc.fr/item/MAN_1984__267_163880/