Plotnikov, A. V., T. A. Komleva, and N. V. Skripnik. “Existence of Basic Solutions of First Order Linear Homogeneous Set-Valued Differential Equations”. Matematychni Studii 61, no. 1 (March 19, 2024): 61-78. Accessed January 2, 2025. http://matstud.org.ua/ojs/index.php/matstud/article/view/459.