@article{DE_1979_15_8_a12,
     author = {G. G. Kazaryan},
     title = {Inequalities for differential polynomials with variable coefficients},
     journal = {Differencialʹnye uravneni\^a},
     pages = {1468--1477},
     publisher = {mathdoc},
     volume = {15},
     number = {8},
     year = {1979},
     language = {ru},
     url = {http://geodesic.mathdoc.fr/item/DE_1979_15_8_a12/}
}