@article{DE_1971_7_7_a10,
     author = {A. A. Tuzhilin},
     title = {A theory of functional equations of {Malju\v{z}inec.} {IV.} {Nonhomogeneous} functional equations with periodic coefficients},
     journal = {Differencialʹnye uravneni\^a},
     pages = {1276--1287},
     year = {1971},
     volume = {7},
     number = {7},
     language = {ru},
     url = {http://geodesic.mathdoc.fr/item/DE_1971_7_7_a10/}
}