@article{DAN_1987_292_6_a8,
     author = {M. I. Gil'},
     title = {Single-circuit systems with several nonlinearities, which satisfy
},
     journal = {Doklady Akademii Nauk},
     pages = {1315--1318},
     publisher = {mathdoc},
     volume = {292},
     number = {6},
     year = {1987},
     language = {ru},
     url = {http://geodesic.mathdoc.fr/item/DAN_1987_292_6_a8/}
}