Shtaras, A. Strongly resonant problems for the Boussinesq equation. (Russian. English summary) Zbl 0643.35084 Differ. Uravn. Primen. 39, 93-103 (1986). MSC: 35Q99 35G20 35B40 35G25 35G30 PDFBibTeX XMLCite \textit{A. Shtaras}, Differ. Uravn. Primen. 39, 93--103 (1986; Zbl 0643.35084)
Shtaras, Arunas Asymptotic solution of some weakly nonlinear wave equations. (Russian. English summary) Zbl 0564.35074 Differ. Uravn. Primen. 35, 107-116 (1984). MSC: 35L70 35A05 PDFBibTeX XMLCite \textit{A. Shtaras}, Differ. Uravn. Primen. 35, 107--116 (1984; Zbl 0564.35074)