@article{DAN_1991_318_6_a13,
     author = {A. L. Krylov and V. N. Nikolaevskii and G. A. El},
     title = {Mathematical model of nonlinear generation of ultrasound
},
     journal = {Doklady Akademii Nauk},
     pages = {1340--1345},
     publisher = {mathdoc},
     volume = {318},
     number = {6},
     year = {1991},
     language = {ru},
     url = {http://geodesic.mathdoc.fr/item/DAN_1991_318_6_a13/}
}