@article{IM2_1993_40_1_a6,
     author = {A. S. Piskunov},
     title = {A (3+1)-dimensional equation admitting a {Lax} representation},
     journal = {Izvestiya. Mathematics },
     pages = {225--233},
     publisher = {mathdoc},
     volume = {40},
     number = {1},
     year = {1993},
     language = {en},
     url = {http://geodesic.mathdoc.fr/item/IM2_1993_40_1_a6/}
}