@article{MS_1942__52_3_a4,
     author = {B. {\CYRV}{\cyra}{\cyrg}{\cyrn}{\cyre}{\cyrr}},
     title = {Differential geometry of the family of $R_k${\textquoteright}s in $R_n$ and of the family of totally geodesic $S_{k-1}${\textquoteright}s in $S_{n-1}$ of positive curvature},
     journal = {Matemati\v{c}eskij sbornik},
     pages = {165--212},
     publisher = {mathdoc},
     volume = {52},
     number = {3},
     year = {1942},
     zbl = {0063.07918},
     language = {en},
     url = {http://geodesic.mathdoc.fr/item/MS_1942__52_3_a4/}
}