Zagorodnyuk, A.V., and V.V. Kravtsiv. “Symmetric Polynomials on the Product of Banach Spaces”. Carpathian Mathematical Publications 2, no. 1 (June 30, 2010): 59–71. Accessed April 19, 2024. https://scijournals.pnu.edu.ua/index.php/cmp/article/view/3992.