Eftekhar, Jahan; Navarro, Ramon; Travis, Betty Isolation estimate of first conjugate point for systems. (English) Zbl 1036.34036 Math. Sci. Res. J. 7, No. 1, 35-40 (2003). MSC: 34C10 34B24 PDFBibTeX XMLCite \textit{J. Eftekhar} et al., Math. Sci. Res. J. 7, No. 1, 35--40 (2003; Zbl 1036.34036)
Eftekhar, Jahan; Navarro, Ramon; Travis, Betty On properties of conjugate points for nonselfadjoint systems. (English) Zbl 1024.34026 Math. Sci. Res. J. 6, No. 1, 20-29 (2002). Reviewer: Sergei A.Mazanik (Minsk) MSC: 34C10 34A30 PDFBibTeX XMLCite \textit{J. Eftekhar} et al., Math. Sci. Res. J. 6, No. 1, 20--29 (2002; Zbl 1024.34026)