@article{DAN_1984_278_3_a19,
     author = {Yu. K. Engelbrecht},
     title = {On the problem of description of nonlinear waves in an active medium},
     journal = {Doklady Akademii Nauk},
     pages = {591--594},
     year = {1984},
     volume = {278},
     number = {3},
     language = {ru},
     url = {http://geodesic.mathdoc.fr/item/DAN_1984_278_3_a19/}
}