@article{DE_1985_21_11_a4,
     author = {A. I. Kolosov},
     title = {A class of boundary value problems reducible to an equation with a heterotonic operator},
     journal = {Differencialʹnye uravneni\^a},
     pages = {1884--1891},
     publisher = {mathdoc},
     volume = {21},
     number = {11},
     year = {1985},
     language = {ru},
     url = {http://geodesic.mathdoc.fr/item/DE_1985_21_11_a4/}
}