Kalajda, O. F.; Shevchenko, A. B.; Shevchenko, M. B. Some problems of the theory of linear differential equations. (Ukrainian) Zbl 0900.34003 Vīsn. Kiïv. Unīv., Mat. Mekh. 29, 22-30 (1987). MSC: 34A05 Explicit solutions, first integrals of ordinary differential equations 34A30 Linear ordinary differential equations and systems, general PDF BibTeX XML Cite \textit{O. F. Kalajda} et al., Visn. Kyïv. Univ., Mat. Mekh. 29, 22--30 (1987; Zbl 0900.34003)