@article{MS2_1963__12_165845,
     author = {Alexandre Froda},
     title = {Crit\`eres param\'etriques d'irrationalit\'e.},
     journal = {Mathematica Scandinavica},
     pages = {199--208},
     publisher = {mathdoc},
     volume = {12},
     year = {1963},
     zbl = {0129.03201},
     url = {http://geodesic.mathdoc.fr/item/MS2_1963__12_165845/}
}