@article{DAN_1967_176_6_a7,
     author = {Yu. S. Kolesov},
     title = {Periodic solutions of a class of differential equations with hysteretic nonlinearity},
     journal = {Doklady Akademii Nauk},
     pages = {1240--1243},
     publisher = {mathdoc},
     volume = {176},
     number = {6},
     year = {1967},
     language = {ru},
     url = {http://geodesic.mathdoc.fr/item/DAN_1967_176_6_a7/}
}