Barotov, Dostonjon N., and Ruziboy N. Barotov. “On One Criterion of Expressibility of Functions of a System of Linear Differential Equations With Constant Coefficients in the Form of Linear Combinations of Derivatives of One Function Included in This System”. Numerical Methods and Programming (Vychislitel’nye Metody i Programmirovanie) 24 (July 5, 2023): 260–274. Accessed December 13, 2025. https://en.num-meth.ru/index.php/journal/article/view/1287.