Bugir, M. K. Many-contour problems for partial differential equations in spaces of constant curvature. (English. Russian original) Zbl 0930.35034 Differ. Equations 33, No. 9, 1299-1302 (1997); translation from Differ. Uravn. 33, No. 9, 1288-1290 (1997). Reviewer: V.Chernyatin (Szczecin) MSC: 35C10 58J05 35J40 PDF BibTeX XML Cite \textit{M. K. Bugir}, Differ. Equations 33, No. 9, 1299--1302 (1997; Zbl 0930.35034); translation from Differ. Uravn. 33, No. 9, 1288--1290 (1997)
Bugir, M. K. A remark on oscillation criteria for the solutions of nonlinear differential equations. (English. Russian original) Zbl 0711.35005 Ukr. Math. J. 42, No. 4, 404-409 (1990); translation from Ukr. Mat. Zh. 42, No. 4, 458-464 (1990). Reviewer: M.Čanak MSC: 35B05 35J65 58J10 PDF BibTeX XML Cite \textit{M. K. Bugir}, Ukr. Math. J. 42, No. 4, 404--409 (1990; Zbl 0711.35005); translation from Ukr. Mat. Zh. 42, No. 4, 458--464 (1990) Full Text: DOI
Bugir, M. K.; Dobrotvor, I. G. Conditions of oscillability for a class of fourth order nonlinear differential equations. (Russian) Zbl 0733.58041 Asymptotic methods in problems of mathematical physics, Collect. Sci. Works, Kiev, 27-36 (1989). Reviewer: G.Hedstrom (Livermore) MSC: 58J32 35G25 PDF BibTeX XML