@article{IM2_1991_37_3_a0,
     author = {O. I. Bogoyavlenskii},
     title = {Breaking {solitons.~IV}},
     journal = {Izvestiya. Mathematics},
     pages = {475--487},
     year = {1991},
     volume = {37},
     number = {3},
     language = {en},
     url = {http://geodesic.mathdoc.fr/item/IM2_1991_37_3_a0/}
}