Bugir, M. K. Note on local nonoscillation indication for systems of equations. (Ukrainian) Zbl 0447.34033 Dopov. Akad. Nauk Ukr. RSR, Ser. A 1980, No. 6, 10-13 (1980). MSC: 34C10 45J05 PDF BibTeX XML Cite \textit{M. K. Bugir}, Dopov. Akad. Nauk Ukr. RSR, Ser. A 1980, No. 6, 10--13 (1980; Zbl 0447.34033)
Bugir, M. K. Conditions of nonoscillation of solutions for the system of equations y(n)+P(t)y=0. (Ukrainian) Zbl 0377.34024 Dopov. Akad. Nauk Ukr. RSR, Ser. A 1977, 873-876 (1977). MSC: 34C10 PDF BibTeX XML Cite \textit{M. K. Bugir}, Dopov. Akad. Nauk Ukr. RSR, Ser. A 1977, 873--876 (1977; Zbl 0377.34024)
Bugir, M. K. Linear factorization of an operator and existence of principal solutions of non-self-adjoint systems of second order differential equations. (Ukrainian) Zbl 0359.34009 Dopov. Akad. Nauk Ukr. RSR, Ser. A 1977, 483-486 (1977). MSC: 34A30 PDF BibTeX XML Cite \textit{M. K. Bugir}, Dopov. Akad. Nauk Ukr. RSR, Ser. A 1977, 483--486 (1977; Zbl 0359.34009)
Bugir, M. K. Nonoscillation of the solutions of systems of strongly elliptical differential equations. (Ukrainian) Zbl 0301.35008 Dopov. Akad. Nauk Ukr. RSR, Ser. A 1975, 101-105 (1975). MSC: 35B99 35B05 35J45 PDF BibTeX XML Cite \textit{M. K. Bugir}, Dopov. Akad. Nauk Ukr. RSR, Ser. A 1975, 101--105 (1975; Zbl 0301.35008)
Bugir, M. K. Über das asymptotische Verhalten der Lösungen linearer Differentialgleichungen dritter Ordnung im separablen Hilbertraum. (Ukrainian) Zbl 0271.34081 Dopov. Akad. Nauk Ukr. RSR, Ser. A 1973, 291-294 (1973). MSC: 34A30 34G99 34C10 PDF BibTeX XML Cite \textit{M. K. Bugir}, Dopov. Akad. Nauk Ukr. RSR, Ser. A 1973, 291--294 (1973; Zbl 0271.34081)
Bugir, M. K.; Pavlyuk, I. A. Bedingungen fü r das Nichtoszillieren der Lösungen gewöhnlicher Differentialgleichungssysteme zweiter Ordnung. (Ukrainian) Zbl 0249.34023 Dopov. Akad. Nauk Ukr. RSR, Ser. A 1973, 5-8 (1973). MSC: 34C10 34A30 PDF BibTeX XML Cite \textit{M. K. Bugir} and \textit{I. A. Pavlyuk}, Dopov. Akad. Nauk Ukr. RSR, Ser. A 1973, 5--8 (1973; Zbl 0249.34023)
Bugir, M. K. Extension of the maman type theorems to the case of systems of differential equations. (Ukrainian) Zbl 0254.34019 Dopov. Akad. Nauk Ukr. RSR, Ser. A 1972, 198-202 (1972). MSC: 34C10 34B10 34A30 PDF BibTeX XML Cite \textit{M. K. Bugir}, Dopov. Akad. Nauk Ukr. RSR, Ser. A 1972, 198--202 (1972; Zbl 0254.34019)