@article{DAN_1960_132_1_a13,
     author = {S. V. Uspenskii},
     title = {Properties of $W_p^r$ classes with a fractional derivative on differentiable manifolds},
     journal = {Doklady Akademii Nauk},
     pages = {60--62},
     year = {1960},
     volume = {132},
     number = {1},
     language = {ru},
     url = {http://geodesic.mathdoc.fr/item/DAN_1960_132_1_a13/}
}