@article{JMPA_1866_2_11__145_0,
     author = {Richaud, Casimir},
     title = {D\'emonstrations de quelques th\'eor\`emes concernant la r\'esolution en nombres entiers de l'\'equation $x^2-\mathrm{N}y^2=-1$},
     journal = {Journal de Math\'ematiques Pures et Appliqu\'ees},
     pages = {145--176},
     publisher = {Gauthier-Villars},
     volume = {2e s{\'e}rie, 11},
     year = {1866},
     language = {fr},
     url = {http://archive.numdam.org/item/JMPA_1866_2_11__145_0/}
}