L. I. Vainerman, “On M. G. Krein’s works in the theory of representations and harmonic analysis on topological groups”, Ukr. Mat. Zhurn., vol. 46, no. 3, pp. 198–211, Mar. 1994, Accessed: Dec. 05, 2025. [Online]. Available: https://umj.imath.kiev.ua/index.php/umj/article/view/5756