@article{10_4064_aa_39_2_113_123,
     author = {F. Beukers},
     title = {On the generalized {Ramanujan-Nagell} equation, {II}},
     journal = {Acta Arithmetica},
     pages = {113--123},
     publisher = {mathdoc},
     volume = {39},
     number = {2},
     year = {1981},
     doi = {10.4064/aa-39-2-113-123},
     language = {en},
     url = {http://geodesic.mathdoc.fr/articles/10.4064/aa-39-2-113-123/}
}