@article{JMPA_1903_5_9__377_0,
     author = {Lerch},
     title = {Sur le nombre des classes de formes quadratiques binaires d'un discriminant positif fondamental},
     journal = {Journal de Math\'ematiques Pures et Appliqu\'ees},
     pages = {377--401},
     publisher = {Gauthier-Villars},
     volume = {5e s{\'e}rie, 9},
     year = {1903},
     language = {fr},
     url = {http://archive.numdam.org/item/JMPA_1903_5_9__377_0/}
}