@article{BSMA_1882_2_6_1_318_1,
     author = {Veth, P.},
     title = {Lettre du {Dr} {P.} {Veth,} professeur de {l'Universit\'e} de {Leyde}},
     journal = {Bulletin des Sciences Math\'ematiques et Astronomiques},
     pages = {318--320},
     publisher = {Gauthier-Villars},
     volume = {2e s{\'e}rie, 6},
     number = {1},
     year = {1882},
     language = {fr},
     url = {http://archive.numdam.org/item/BSMA_1882_2_6_1_318_1/}
}