Voir la notice de l'article provenant de la source European Digital Mathematics Library
@article{MS_1958__88_3_a1, author = {{\CYRYU}.{\CYRE}. {\CYRP}{\cyre}{\cyrn}{\cyrz}{\cyro}{\cyrv}}, title = {{\CYRD}{\cyrv}{\cyru}{\cyrm}{\cyre}{\cyrr}{\cyrn}{\cyrery}{\cyre} {\cyrp}{\cyru}{\cyrch}{\cyrk}{\cyri} {\cyrg}{\cyre}{\cyro}{\cyrm}{\cyre}{\cyrt}{\cyrr}{\cyri}{\cyrch}{\cyre}{\cyrs}{\cyrk}{\cyri}{\cyrh} {\cyro}{\cyrb}{\cyrhrdsn}{\cyre}{\cyrk}{\cyrt}{\cyro}{\cyrv} {\cyrv} $X_1$}, journal = {Matemati\v{c}eskij sbornik}, pages = {291--314}, publisher = {mathdoc}, volume = {88}, number = {3}, year = {1958}, zbl = {0092.14303}, language = {ru}, url = {http://geodesic.mathdoc.fr/item/MS_1958__88_3_a1/} }
Ю.Е. Пензов. Двумерные пучки геометрических объектов в $X_1$. Matematičeskij sbornik, Tome 88 (1958) no. 3, pp. 291-314. http://geodesic.mathdoc.fr/item/MS_1958__88_3_a1/