@article{BSMA_1878_2_2_1_41_0,
     author = {Dewulf, Ed.},
     title = {Essai d'une th\'eorie g\'eom\'etrique des polaires inclin\'ees},
     journal = {Bulletin des Sciences Math\'ematiques et Astronomiques},
     pages = {41--48},
     publisher = {Gauthier-Villars},
     volume = {2e s{\'e}rie, 2},
     number = {1},
     year = {1878},
     language = {fr},
     url = {http://archive.numdam.org/item/BSMA_1878_2_2_1_41_0/}
}