@article{BSMF_1900__28__1_0,
     author = {Goursat, E.},
     title = {Sur une transformation de l{\textquoteright}\'equation $s^2 = 4\lambda (x,y)pq$},
     journal = {Bulletin de la Soci\'et\'e Math\'ematique de France},
     pages = {1--6},
     publisher = {Soci\'et\'e math\'ematique de France},
     volume = {28},
     year = {1900},
     doi = {10.24033/bsmf.616},
     language = {fr},
     url = {http://www.numdam.org/articles/10.24033/bsmf.616/}
}