@article{BSMF_1907__35__126_0,
     author = {Niewenglowski, B.},
     title = {Sur les \'equations $x^{2}-ay^{2}=1$ et $x^{2}-ay^{2}=-1$},
     journal = {Bulletin de la Soci\'et\'e Math\'ematique de France},
     pages = {126--131},
     publisher = {Soci\'et\'e math\'ematique de France},
     volume = {35},
     year = {1907},
     doi = {10.24033/bsmf.800},
     language = {fr},
     url = {http://archive.numdam.org/articles/10.24033/bsmf.800/}
}