@article{DE_1986_22_12_a2,
     author = {N. V. Azbelev and A. I. Domoshnitskii},
     title = {On de la {Vall\'ee} {Poussin's} differential inequality},
     journal = {Differencialʹnye uravneni\^a},
     pages = {2041--2045},
     publisher = {mathdoc},
     volume = {22},
     number = {12},
     year = {1986},
     language = {ru},
     url = {http://geodesic.mathdoc.fr/item/DE_1986_22_12_a2/}
}