%0 Journal Article %A V. B. Matveev %A A. O. Smirnov %T On the simplest trigonal solutions of the Boussinesq equation and the Kadomtsev--Petviashvili equation %J Doklady Akademii Nauk %D 1987 %P 78-82 %V 293 %N 1 %I mathdoc %U http://geodesic.mathdoc.fr/item/DAN_1987_293_1_a17/ %G ru %F DAN_1987_293_1_a17