Mukhamadiev, F., Z. Artykova, T. Yuldashev, and G. Matieva. “Density-Type Properties of the Space of the Solutions of an Ordinary Differential Equation”. Journal of Osh State University. Differential Equations, no. 1, Jan. 2026, pp. 78-85, https://journal.oshsu.kg/index.php/diffeq/article/view/3582.