@article{MZM_1969_5_4_a1,
     author = {Ya. M. Chikvashvili},
     title = {A generalization of the {Ricci} identity for a function of a field of arbitrary type given in a space of affine connectedness},
     journal = {Matemati\v{c}eskie zametki},
     pages = {409--411},
     publisher = {mathdoc},
     volume = {5},
     number = {4},
     year = {1969},
     language = {ru},
     url = {http://geodesic.mathdoc.fr/item/MZM_1969_5_4_a1/}
}