Ronto, V. A.; Ronto, N. I. Über die Ermittlung der Anfangswerte der periodischen Lösungen von nichtautonomen Differentialgleichungen. (Russian) Zbl 0461.34025 Analytical methods of studying the solution of non-linear differential equations, Thematic Work Collect., Kiev 1975, 132-138 (1975). MSC: 34C25 34A45 PDFBibTeX XML
Bohl, Erich On finite difference methods as applied to boundary value problems. (English) Zbl 0418.65047 Pubbl. Ser. III. Ist. Appl. Calcolo 100, 35 P. (1975). MSC: 65N06 65L10 65L07 65N12 PDFBibTeX XML
Demin, V. G. Fate of solar system. (Sud’ba solnecnoi sistemy.). (Russian) Zbl 0404.70006 Populjarnye Ogerki po pebesnoi Mehaniki. Moskva: Izdatel’stvo “Nauka”. 264 p. R. 0.42 (1975). MSC: 70F15 37C75 34D05 34D20 34D30 70-01 70-03 70M20 PDFBibTeX XML