@article{DAN_1973_212_4_a3,
     author = {V. R. Kaigorodov},
     title = {The curvature of $s$-recurrent and quasisymmetric {Riemannian} manifolds},
     journal = {Doklady Akademii Nauk},
     pages = {796--799},
     publisher = {mathdoc},
     volume = {212},
     number = {4},
     year = {1973},
     language = {ru},
     url = {http://geodesic.mathdoc.fr/item/DAN_1973_212_4_a3/}
}