@article{DAN_1965_164_1_a5,
     author = {Yu. A. Dmitriev},
     title = {Frequency conditions for dissipation and existence of periodic solutions in the case of pulse systems with one non-linear block},
     journal = {Doklady Akademii Nauk},
     pages = {28--31},
     publisher = {mathdoc},
     volume = {164},
     number = {1},
     year = {1965},
     language = {ru},
     url = {http://geodesic.mathdoc.fr/item/DAN_1965_164_1_a5/}
}