@article{FAA_2007_41_1_a5,
     author = {N. B. Zhuravlev},
     title = {A {Hyperbolicity} {Criterion} for {Periodic} {Solutions} of {Functional-Differential} {Equations:} {The} {Case} of {Rational} {Periods}},
     journal = {Funkcionalʹnyj analiz i ego prilo\v{z}eni\^a},
     pages = {90--92},
     publisher = {mathdoc},
     volume = {41},
     number = {1},
     year = {2007},
     language = {ru},
     url = {http://geodesic.mathdoc.fr/item/FAA_2007_41_1_a5/}
}