Voir la notice de l'article provenant de la source European Digital Mathematics Library
@article{MS_1953__75_1_a11, author = {{\CYRI}.{\CYRC}. {\CYRG}{\cyro}{\cyrh}{\cyrb}{\cyre}{\cyrr}{\cyrg}}, title = {{\CYRO}{\cyrb} {\cyri}{\cyrn}{\cyrd}{\cyre}{\cyrk}{\cyrs}{\cyre} {\cyrn}{\cyre}{\cyro}{\cyrg}{\cyrr}{\cyra}{\cyrn}{\cyri}{\cyrch}{\cyre}{\cyrn}{\cyrn}{\cyro}{\cyrg}{\cyro} {\cyro}{\cyrp}{\cyre}{\cyrr}{\cyra}{\cyrt}{\cyro}{\cyrr}{\cyra}}, journal = {Matemati\v{c}eskij sbornik}, pages = {193--198}, publisher = {mathdoc}, volume = {75}, number = {1}, year = {1953}, zbl = {0052.34603}, language = {ru}, url = {http://geodesic.mathdoc.fr/item/MS_1953__75_1_a11/} }
И.Ц. Гохберг. Об индексе неограниченного оператора. Matematičeskij sbornik, Tome 75 (1953) no. 1, pp. 193-198. http://geodesic.mathdoc.fr/item/MS_1953__75_1_a11/