@article{GDZPPN002360888, title = {The converse to Alexandre Froda's irrationality criterion.}, journal = {Mathematica Scandinavica}, volume = {69}, year = {1991}, pages = {5-18}, zbl = {0731.11042}, url = {http://dml.mathdoc.fr/item/GDZPPN002360888} }
Sanker, David. The converse to Alexandre Froda's irrationality criterion.. Mathematica Scandinavica, Tome 69 (1991) pp. 5-18. http://gdmltest.u-ga.fr/item/GDZPPN002360888/