@article{MZM_1978_23_4_a13,
     author = {V. V. Navrozov},
     title = {$H$-transformations in {Riemannian} spaces},
     journal = {Matemati\v{c}eskie zametki},
     pages = {617--625},
     publisher = {mathdoc},
     volume = {23},
     number = {4},
     year = {1978},
     language = {ru},
     url = {http://geodesic.mathdoc.fr/item/MZM_1978_23_4_a13/}
}