Bugir, M. K. Conditions for the nonoscillation of solutions to systems of second-order differential equations. (English. Russian original) Zbl 1003.34029 Russ. Math. 44, No. 5, 10-16 (2000); translation from Izv. Vyssh. Uchebn. Zaved., Mat. 2000, No. 5, 12-18 (2000). MSC: 34C10 35B05 PDF BibTeX XML Cite \textit{M. K. Bugir}, Russ. Math. 44, No. 5, 10--16 (2000; Zbl 1003.34029); translation from Izv. Vyssh. Uchebn. Zaved., Mat. 2000, No. 5, 12--18 (2000)
Bugir, M. K. Estimates for the conditional stability of a two-contour boundary value problem in the disk. (English. Russian original) Zbl 0961.35040 Russ. Math. 42, No. 10, 5-12 (1998); translation from Izv. Vyssh. Uchebn. Zaved., Mat. 1998, No. 10, 7-14 (1998). MSC: 35J40 30E25 35B35 PDF BibTeX XML Cite \textit{M. K. Bugir}, Russ. Math. 42, No. 10, 5--12 (1998; Zbl 0961.35040); translation from Izv. Vyssh. Uchebn. Zaved., Mat. 1998, No. 10, 7--14 (1998)
Bugir, M. K. Ill-posed boundary value problems for the \(n\)-th order polyharmonic equation. (English. Russian original) Zbl 0842.35026 Russ. Math. 38, No. 10, 16-21 (1994); translation from Izv. Vyssh. Uchebn. Zaved., Mat. 1994, No. 10 (389), 19-25 (1994). Reviewer: J.Jaenicke (Braunschweig) MSC: 35J40 35C05 33C10 PDF BibTeX XML Cite \textit{M. K. Bugir}, Russ. Math. 38, No. 10, 16--21 (1994; Zbl 0842.35026); translation from Izv. Vyssh. Uchebn. Zaved., Mat. 1994, No. 10 (389), 19--25 (1994)