@article{DAN_1975_220_4_a9,
     author = {N. I. Yatskin},
     title = {Questions of reducibility to a special form of linear differential equations on manifolds},
     journal = {Doklady Akademii Nauk},
     pages = {792--794},
     publisher = {mathdoc},
     volume = {220},
     number = {4},
     year = {1975},
     language = {ru},
     url = {http://geodesic.mathdoc.fr/item/DAN_1975_220_4_a9/}
}