Voir la notice de l'article provenant de la source Math-Net.Ru
@article{IVM_1958_6_a18, author = {Nguyen Khanh Toan}, title = {Some new properties of curves of the second order in the elliptic plane}, journal = {Izvesti\^a vys\v{s}ih u\v{c}ebnyh zavedenij. Matematika}, pages = {193--202}, publisher = {mathdoc}, number = {6}, year = {1958}, language = {ru}, url = {http://geodesic.mathdoc.fr/item/IVM_1958_6_a18/} }
Nguyen Khanh Toan. Some new properties of curves of the second order in the elliptic plane. Izvestiâ vysših učebnyh zavedenij. Matematika, no. 6 (1958), pp. 193-202. http://geodesic.mathdoc.fr/item/IVM_1958_6_a18/