@article{KUTGS_1991_21_a10,
     author = {T. A. Panteleeva},
     title = {Extension of the {Ricci} tensor to the second-order semitangent bundle},
     journal = {Trudy Geometricheskogo Seminara},
     pages = {79--85},
     year = {1991},
     volume = {21},
     language = {ru},
     url = {http://geodesic.mathdoc.fr/item/KUTGS_1991_21_a10/}
}