Boundary value problem for the equation $(\Delta - c^{2})^{p}u(x) = F(x,\Delta^{o}u(x), ...,\Delta^{p-1}u(x))$ in some unbounded domain in $E_{n}$ / Maria FILAR, Krystyna SZAŁAJKO // Opuscula Mathematica ; ISSN 1232-9274. — Tytuł poprz.: Scientific Bulletins of Stanisław Staszic Academy of Mining and Metallurgy. Opuscula Mathematica. — 2002 R. 22, s. 11–19. — Bibliogr. s. 19, Abstr.