Voir la notice de l'article provenant de la source Hellenic Digital Mathematics Library
@article{EUG_1987__15_a15, author = {Grigorios Tsagas}, title = {On the {Surfaces} {Whose} {Normal} {Bundles} {Have} {Special} {Properties}}, journal = {E\ensuremath{\upsilon}\ensuremath{\kappa}\ensuremath{\lambda}\ensuremath{\varepsilon}\ensuremath{\acute\iota}\ensuremath{\delta}\ensuremath{\eta}\ensuremath{\varsigma} \ensuremath{\Gamma} }, pages = {59-67}, publisher = {mathdoc}, volume = {15}, year = {1987}, language = {gr}, url = {http://geodesic.mathdoc.fr/item/EUG_1987__15_a15/} }
Grigorios Tsagas. On the Surfaces Whose Normal Bundles Have Special Properties. Ευκλείδης Γ , Tome 15 (1987), p. 59-67. http://geodesic.mathdoc.fr/item/EUG_1987__15_a15/