Bang, H. H., and V. N. Huy. “Paley – Wiener Type Theorem for Functions With Values in Banach Spaces”. Ukrains’kyi Matematychnyi Zhurnal 74, no. 6 (July 7, 2022): 731 - 742. Accessed August 15, 2022. https://umj.imath.kiev.ua/index.php/umj/article/view/2382.