@article{KUIPM_1989_a12,
     author = {N. P. Evlampiev},
     title = {Periodic solutions of a functional equation with linearly deviating argument},
     journal = {Issledovaniya po Prikladnoi Matematike i Informatike},
     pages = {125--131},
     publisher = {mathdoc},
     year = {1989},
     language = {ru},
     url = {http://geodesic.mathdoc.fr/item/KUIPM_1989_a12/}
}