@article{SM_2007_198_6_a4,
     author = {N. B. Engibaryan and A. Kh. Khachatryan},
     title = {Integro-differential equation of non-local wave interaction},
     journal = {Sbornik. Mathematics},
     pages = {839--855},
     year = {2007},
     volume = {198},
     number = {6},
     language = {en},
     url = {http://geodesic.mathdoc.fr/item/SM_2007_198_6_a4/}
}