Symotyuk, M. M.; Savka, I. Ya. Initial-nonlocal boundary value problems for factorized partial differential equations. (Ukrainian. English summary) Zbl 1289.35061 Visn. Derzh. Univ. L’viv. Politekh. 768, 19-25 (2013). MSC: 35G30 PDF BibTeX XML Cite \textit{M. M. Symotyuk} and \textit{I. Ya. Savka}, Visn. Derzh. Univ. L'viv. Politekh. 768, 19--25 (2013; Zbl 1289.35061)
Dubins’kyj, Yu. A.; Il’kiv, V. S.; Savka, I. Ya.; Symotyuk, M. M. Nonlocal boundary value problems for infinite order partial differential equations with algebraic dependent coefficients. (Ukrainian. English summary) Zbl 1289.35001 Visn. Derzh. Univ. L’viv. Politekh. 687, 97-104 (2010). MSC: 35A01 PDF BibTeX XML Cite \textit{Yu. A. Dubins'kyj} et al., Visn. Derzh. Univ. L'viv. Politekh. 687, 97--104 (2010; Zbl 1289.35001)