@article{IVM_2018_10_a3,
     author = {A. A. Kosov and E. I. Semenov},
     title = {On analytic periodic solutions to nonlinear differential equations with a delay (advancing)},
     journal = {Izvesti\^a vys\v{s}ih u\v{c}ebnyh zavedenij. Matematika},
     pages = {34--42},
     publisher = {mathdoc},
     number = {10},
     year = {2018},
     language = {ru},
     url = {http://geodesic.mathdoc.fr/item/IVM_2018_10_a3/}
}