@article{JRAM_1990__407_153231,
     author = {Masayoshi Hata},
     title = {Legendre type polynomials and irrationality measures.},
     journal = {Journal f\"ur die reine und angewandte Mathematik},
     pages = {99--125},
     publisher = {mathdoc},
     volume = {407},
     year = {1990},
     zbl = {0692.10034},
     url = {http://geodesic.mathdoc.fr/item/JRAM_1990__407_153231/}
}