@article{IVM_1965_5_a1,
     author = {A. M. Anchikov},
     title = {The invariant tensor criterion for conformally reducible {Riemannian} spaces},
     journal = {Izvesti\^a vys\v{s}ih u\v{c}ebnyh zavedenij. Matematika},
     pages = {13--18},
     publisher = {mathdoc},
     number = {5},
     year = {1965},
     language = {ru},
     url = {http://geodesic.mathdoc.fr/item/IVM_1965_5_a1/}
}