Hefter, S. L.; Goncharuk, A. B. Linear differential equation with inhomogeneity in the form of a formal power series over a ring with non-Archimedean valuation. (English. Ukrainian original) Zbl 07721188 Ukr. Math. J. 74, No. 11, 1668-1685 (2023); translation from Ukr. Mat. Zh. 74, No. 11, 1463-1477 (2022). Reviewer: Pavel Rehak (Brno) MSC: 34A25 34A30 PDFBibTeX XMLCite \textit{S. L. Hefter} and \textit{A. B. Goncharuk}, Ukr. Math. J. 74, No. 11, 1668--1685 (2023; Zbl 07721188); translation from Ukr. Mat. Zh. 74, No. 11, 1463--1477 (2022) Full Text: DOI
Kuchko, L. P. Local solvability of linear functional equations. (English) Zbl 0643.39001 Ukr. Math. J. 39, No. 3, 260-263 (1987). MSC: 39B12 PDFBibTeX XMLCite \textit{L. P. Kuchko}, Ukr. Math. J. 39, No. 3, 260--263 (1987; Zbl 0643.39001) Full Text: DOI
Voronoj, A. N. Construction of formal solutions of a linear system of integrodifferential equations with small parameter and variable delay. (English) Zbl 0518.45004 Ukr. Math. J. 34, 602-606 (1983). MSC: 45J05 45M05 PDFBibTeX XMLCite \textit{A. N. Voronoj}, Ukr. Math. J. 34, 602--606 (1983; Zbl 0518.45004) Full Text: DOI