Kozak, P. P. On the solution of characteristic problems for a system of linear equations of higher orders in form of a continual integral. (Ukrainian) Zbl 0295.35012 Dopov. Akad. Nauk Ukr. RSR, Ser. A 1975, 198-201 (1975). MSC: 35G10 35C15 PDFBibTeX XMLCite \textit{P. P. Kozak}, Dopov. Akad. Nauk Ukr. RSR, Ser. A 1975, 198--201 (1975; Zbl 0295.35012)
Kozak, P. P. On a representation of the solution of the characteristic problem for a linear equation in the form of a continual integral. (English. Russian original) Zbl 0304.35066 Ukr. Math. J. 26, 69-73 (1974); translation from Ukr. Mat. Zh. 26, 84-90 (1974). MSC: 35L35 34A30 28C20 45E10 PDFBibTeX XMLCite \textit{P. P. Kozak}, Ukr. Math. J. 26, 69--73 (1974; Zbl 0304.35066); translation from Ukr. Mat. Zh. 26, 84--90 (1974) Full Text: DOI
Kozak, P. P. On a representation of the solution of a characteristic problem for a linear equation of higher order in the form of a continuous integral. (Ukrainian) Zbl 0283.35012 Dopov. Akad. Nauk Ukr. RSR, Ser. A 1974, 692-694 (1974). MSC: 35G05 35C15 PDFBibTeX XMLCite \textit{P. P. Kozak}, Dopov. Akad. Nauk Ukr. RSR, Ser. A 1974, 692--694 (1974; Zbl 0283.35012)
Kozak, P. P. Einige Verbindungen von Differentialgleichungen mit kontinuierlichem Integral. (Ukrainian) Zbl 0252.34009 Dopov. Akad. Nauk Ukr. RSR, Ser. A 1972, 978-982 (1972). MSC: 34A25 35C10 PDFBibTeX XMLCite \textit{P. P. Kozak}, Dopov. Akad. Nauk Ukr. RSR, Ser. A 1972, 978--982 (1972; Zbl 0252.34009)