@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/}
}