@article{KUIPM_1984_11_11_a0,
     author = {V. G. Nikitin},
     title = {Eigenvalues of differential equations with linearly deviating argument. {The} periodic problem},
     journal = {Issledovaniya po Prikladnoi Matematike i Informatike},
     pages = {3--12},
     year = {1984},
     volume = {11},
     number = {11},
     language = {ru},
     url = {http://geodesic.mathdoc.fr/item/KUIPM_1984_11_11_a0/}
}