Holubchak, O.M., and A.V. Zagorodnyuk. “On Bidual Bases in the Space of Symmetric Analytic Functions on $\ell_1$”. Carpathian Mathematical Publications 5, no. 1 (June 20, 2013): 47–49. Accessed November 21, 2024. https://journals.pnu.edu.ua/index.php/cmp/article/view/3649.