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@article{JRAM_1956__196_150316, author = {W.K. Hayman}, title = {A {Generalisation} of {Stirling's} {Formula.}}, journal = {Journal f\"ur die reine und angewandte Mathematik}, pages = {67--95}, publisher = {mathdoc}, volume = {196}, year = {1956}, zbl = {0072.06901}, url = {http://geodesic.mathdoc.fr/item/JRAM_1956__196_150316/} }
W.K. Hayman. A Generalisation of Stirling's Formula.. Journal für die reine und angewandte Mathematik, Tome 196 (1956), pp. 67-95. http://geodesic.mathdoc.fr/item/JRAM_1956__196_150316/