@article{DAN_1983_270_5_a9,
     author = {V. S. Shulman},
     title = {On linear equations with normal coefficients},
     journal = {Doklady Akademii Nauk},
     pages = {1070--1073},
     year = {1983},
     volume = {270},
     number = {5},
     language = {ru},
     url = {http://geodesic.mathdoc.fr/item/DAN_1983_270_5_a9/}
}