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@article{PORMA_1996__53_2_47561, author = {Duverney, Daniel}, title = {A criterion of irrationality.}, journal = {Portugaliae mathematica}, pages = {229--237}, publisher = {mathdoc}, volume = {53}, number = {2}, year = {1996}, zbl = {0854.11037}, language = {en}, url = {http://geodesic.mathdoc.fr/item/PORMA_1996__53_2_47561/} }
Duverney, Daniel. A criterion of irrationality.. Portugaliae mathematica, Tome 53 (1996) no. 2, pp. 229-237. http://geodesic.mathdoc.fr/item/PORMA_1996__53_2_47561/