Fedak, O.I., and A.V. Zagorodnyuk. “Strictly Diagonal Holomorphic Functions on Banach Spaces”. Carpathian Mathematical Publications 7, no. 2 (December 24, 2015): 254–258. Accessed January 18, 2025. https://personnel.pnu.edu.ua/index.php/cmp/article/view/1405.