@article{DE_1983_19_10_a0,
     author = {B. P. Bogoslovskii and S. I. Ostroumov},
     title = {Equations with fixed transcendental and essentially singular points},
     journal = {Differencialʹnye uravneni\^a},
     pages = {1659--1667},
     publisher = {mathdoc},
     volume = {19},
     number = {10},
     year = {1983},
     language = {ru},
     url = {http://geodesic.mathdoc.fr/item/DE_1983_19_10_a0/}
}