@article{JRAM_1935__173_149931,
     author = {L. R\'edei},
     title = {\"Uber die {Pellsche} {Gleichung} t2 - du2 = -1.},
     journal = {Journal f\"ur die reine und angewandte Mathematik},
     pages = {193--221},
     publisher = {mathdoc},
     volume = {173},
     year = {1935},
     zbl = {61.0138.02},
     url = {http://geodesic.mathdoc.fr/item/JRAM_1935__173_149931/}
}