@article{BSMA_1871__2__250_0,
     author = {Ermakof, V.},
     title = {Caract\`ere de convergence des s\'eries},
     journal = {Bulletin des Sciences Math\'ematiques et Astronomiques},
     pages = {250--256},
     publisher = {Gauthier-Villars},
     volume = {2},
     year = {1871},
     language = {fr},
     url = {http://archive.numdam.org/item/BSMA_1871__2__250_0/}
}