@article{DAN_1965_164_1_a14,
     author = {R. F. Shevchenko},
     title = {On the trace of a differential operator},
     journal = {Doklady Akademii Nauk},
     pages = {62--65},
     year = {1965},
     volume = {164},
     number = {1},
     language = {ru},
     url = {http://geodesic.mathdoc.fr/item/DAN_1965_164_1_a14/}
}