Sozontova, E. A. A conditions of solvability of the Goursat problem in quadratures for the two-dimensional system of high order. (Russian. English summary) Zbl 1413.35272 Vestn. Samar. Gos. Tekh. Univ., Ser. Fiz.-Mat. Nauki 21, No. 1, 94-111 (2017). MSC: 35K70 PDF BibTeX XML Cite \textit{E. A. Sozontova}, Vestn. Samar. Gos. Tekh. Univ., Ser. Fiz.-Mat. Nauki 21, No. 1, 94--111 (2017; Zbl 1413.35272) Full Text: DOI MNR OpenURL
Mamedov, Il’gar Gurbat On a nonclassical interpretation of the four-dimensional Goursat problem for a hyberbolic equation. (Russian. English summary) Zbl 1474.35455 Vladikavkaz. Mat. Zh. 17, No. 4, 59-66 (2015). MSC: 35L35 PDF BibTeX XML Cite \textit{I. G. Mamedov}, Vladikavkaz. Mat. Zh. 17, No. 4, 59--66 (2015; Zbl 1474.35455) Full Text: MNR OpenURL