@article{PORMA_1941__2_1_114588,
     author = {Cunha, Pedro Jos\'e da},
     title = {Du parall\'elisme dans l'espace euclid\'een},
     journal = {Portugaliae mathematica},
     pages = {177--246},
     publisher = {mathdoc},
     volume = {2},
     number = {1},
     year = {1941},
     mrnumber = {0006475},
     zbl = {0063.01021},
     language = {fr},
     url = {http://geodesic.mathdoc.fr/item/PORMA_1941__2_1_114588/}
}