Bereslavskij, Eh. N. On integration in closed form of a class of Fuchs equations and its application. (Russian) Zbl 0713.34002 Differ. Uravn. 25, No. 6, 1048-1050 (1989). Reviewer: S.G.Hristova MSC: 34A05 34A99 PDFBibTeX XMLCite \textit{Eh. N. Bereslavskij}, Differ. Uravn. 25, No. 6, 1048--1050 (1989; Zbl 0713.34002)
Mustafin, M. A. On the Riesz basis of a sine system. (Russian) Zbl 0696.34013 Differ. Uravn. 25, No. 10, 1832-1833 (1989). Reviewer: N.Bozhinov MSC: 34B10 42C30 42C15 PDFBibTeX XMLCite \textit{M. A. Mustafin}, Differ. Uravn. 25, No. 10, 1832--1833 (1989; Zbl 0696.34013)
Kadelburg, Eh.; Martinović, M. The spectral function of a second order functional-differential operator. (Russian) Zbl 0693.34070 Differ. Uravn. 25, No. 11, 1882-1888 (1989). Reviewer: M.Tvrdy MSC: 34K10 34L99 PDFBibTeX XMLCite \textit{Eh. Kadelburg} and \textit{M. Martinović}, Differ. Uravn. 25, No. 11, 1882--1888 (1989; Zbl 0693.34070)
Volkov, V. E. On the boundedness of the number of orthogonal solutions of the equation \(-u''+q(x)u=\lambda u\). (Russian) Zbl 0693.34037 Differ. Uravn. 25, No. 11, 1862-1866 (1989). Reviewer: D.Bobrowski MSC: 34C11 PDFBibTeX XMLCite \textit{V. E. Volkov}, Differ. Uravn. 25, No. 11, 1862--1866 (1989; Zbl 0693.34037)
Tsapenko, N. E. New formulae for approximate solution of one-dimensional wave equation. (Russian) Zbl 0693.34008 Differ. Uravn. 25, No. 11, 1941-1946 (1989). Reviewer: L.Janos MSC: 34A45 34C20 PDFBibTeX XMLCite \textit{N. E. Tsapenko}, Differ. Uravn. 25, No. 11, 1941--1946 (1989; Zbl 0693.34008)
Orlovskij, D. G. On an inverse problem for a second order differential equation in Banach space. (Russian) Zbl 0692.34064 Differ. Uravn. 25, No. 6, 1000-1009 (1989). Reviewer: H.O.Fattorini MSC: 34G10 34A55 35Q99 93B05 PDFBibTeX XMLCite \textit{D. G. Orlovskij}, Differ. Uravn. 25, No. 6, 1000--1009 (1989; Zbl 0692.34064)
Dovletov, D. M. On a nonlocal boundary value problem of first kind in differential and difference treatments. (Russian) Zbl 0691.34012 Differ. Uravn. 25, No. 8, 1297-1307 (1989). Reviewer: M.Möller MSC: 34B10 PDFBibTeX XMLCite \textit{D. M. Dovletov}, Differ. Uravn. 25, No. 8, 1297--1307 (1989; Zbl 0691.34012)
Semerdzhieva, R. I. On a difference method for solving a class of hyperbolic equations with degeneration of the order. (Russian) Zbl 0685.65084 Differ. Uravn. 25, No. 10, 1755-1766 (1989). Reviewer: S.Spassov MSC: 65M06 35L15 35L80 PDFBibTeX XMLCite \textit{R. I. Semerdzhieva}, Differ. Uravn. 25, No. 10, 1755--1766 (1989; Zbl 0685.65084)
Yanushauskas, A. On an integrodifferential operator of potential theory. (Russian) Zbl 0667.45013 Differ. Uravn. 25, No. 2, 325-329 (1989). Reviewer: C.Constanda MSC: 45P05 47Gxx 31B20 35J25 PDFBibTeX XMLCite \textit{A. Yanushauskas}, Differ. Uravn. 25, No. 2, 325--329 (1989; Zbl 0667.45013)