Dmytryshyn R, Sharyn S. Approximation of functions of several variables by multidimensional $S$-fractions with independent variables. Carpathian Math. Publ. [Internet]. 2021 Nov. 20 [cited 2024 Apr. 19];13(3):592-607. Available from: https://journals.pnu.edu.ua/index.php/cmp/article/view/4995