Н. В. Гаянов, А. В. Парусникова, “О содержащих логарифмы формальных решениях $q$-разностных уравнений”, Сиб. матем. журн., 65:5 (2024), 863–875 ; N. V. Gaianov, A. V. Parusnikova, “On formal solutions to $q$-difference equations containing logarithms”, Siberian Math. J., 65:5 (2024), 1062–1073
A. Bruno, “Normal forms of a polynomial ODE”, Recent Trends in Formal and Analytic Solutions of Diff. Equations, Contemporary Mathematics, 782, 2023, 1–6
V. S. Samovol, “On the solutions of ordinary differential equations in the form of Dulac series”, Qual. Theor. Dyn. Syst., 21:2 (2022), 47
В. С. Самовол, “О разложениях решений нелинейных обыкновенных дифференциальных уравнений в сходящиеся ряды”, Докл. РАН. Матем., информ., проц. упр., 503 (2022), 70–75 ; V. S. Samovol, “On convergent series expansions for solutions of nonlinear ordinary differential equations”, Dokl. Math., 105:2 (2022), 112–116
Gontsov R.R., Goryuchkina V I., “On the Convergence of Formal Exotic Series Solutions of An Ode”, Comput. Methods Funct. Theory, 20:2 (2020), 279–295