Soviet Physics Journal.
Kluwer Academic Publishers-Plenum Publishers.
Том 25.
1982.
С. 788-790
The problem of determining the stability domain (in Lyapunov sense) of three dimensional soliton solutions is considered. Some necessary conditions for stability are obtained and it is shown that the boundary of the stability domain is defined by the inequality ωiωk(π{variant}Qi/π{variant}ωk < 0. © 1982.