@article{KUIPM_1984_10_10_a20,
     author = {V. G. Nikitin},
     title = {Adjoint operator of the periodic problem for linear differential equations with deviating arguments},
     journal = {Issledovaniya po Prikladnoi Matematike i Informatike},
     pages = {190--195},
     year = {1984},
     volume = {10},
     number = {10},
     language = {ru},
     url = {http://geodesic.mathdoc.fr/item/KUIPM_1984_10_10_a20/}
}