@article{IM2_1990_34_2_a1,
     author = {O. I. Bogoyavlenskii},
     title = {Overturning solitons in new two-dimensional integrable equations},
     journal = {Izvestiya. Mathematics},
     pages = {245--259},
     year = {1990},
     volume = {34},
     number = {2},
     language = {en},
     url = {http://geodesic.mathdoc.fr/item/IM2_1990_34_2_a1/}
}