Mierzejewski, D. A., and Yu. M. Berezansky. “The Structure of the Extended Symmetric Fock Space”. Methods of Functional Analysis and Topology 6, no. 4 (December 25, 2000): 1–13. Accessed December 17, 2025. https://zen.imath.kiev.ua/index.php/mfat/article/view/128.