Krastanov, Mikhail; Ribarska, Nadezhda Viability and an Olech type result. (English) Zbl 1324.34032 Serdica Math. J. 39, No. 3-4, 423-446 (2013). Reviewer: Ts. Y. Tsachev (Sofia) MSC: 34A60 PDFBibTeX XMLCite \textit{M. Krastanov} and \textit{N. Ribarska}, Serdica Math. J. 39, No. 3--4, 423--446 (2013; Zbl 1324.34032)
Donchev, Tzanko (ed.); Krastanov, Mikhail (ed.); Ribarska, Nadezhda (ed.); Tsachev, Tsvetomir (ed.); Zlateva, Nadia (ed.) Asen L. Dontchev (on the occasion of his 65th birthday) and Vladimir M. Veliov (on the occasion of his 60th birthday). (English) Zbl 1324.01008 Serdica Math. J. 39, No. 3-4, i-iv (2013). MSC: 01A70 00B15 PDFBibTeX XMLCite \textit{T. Donchev} (ed.) et al., Serdica Math. J. 39, No. 3--4, i-iv (2013; Zbl 1324.01008)
Ribarska, N. K.; Tsachev, Ts. Y.; Krastanov, M. I. Speculating about mountains. (English) Zbl 0871.58020 Serdica Math. J. 22, No. 3, 341-358 (1996). Reviewer: B.V.Loginov (Ul’yanovsk) MSC: 58E05 PDFBibTeX XMLCite \textit{N. K. Ribarska} et al., Serdica Math. J. 22, No. 3, 341--358 (1996; Zbl 0871.58020) Full Text: EuDML
Ribarska, Nadezhda; Tsachev, Tsvetomir; Krastanov, Mikhail Deformation lemma, Lyusternik-Schnirelman theory and mountain pass theorem on \(C^ 1\)-Finsler manifolds. (English) Zbl 0837.58009 Serdica Math. J. 21, No. 3, 239-266 (1995). MSC: 58E05 58B20 PDFBibTeX XMLCite \textit{N. Ribarska} et al., Serdica Math. J. 21, No. 3, 239--266 (1995; Zbl 0837.58009) Full Text: EuDML