@article{DAN_1990_311_6_a6,
     author = {G. P. Pelyukh},
     title = {Solutions of systems of nonlinear functional equations that are},
     journal = {Doklady Akademii Nauk},
     pages = {1309--1311},
     publisher = {mathdoc},
     volume = {311},
     number = {6},
     year = {1990},
     language = {ru},
     url = {http://geodesic.mathdoc.fr/item/DAN_1990_311_6_a6/}
}