Berezansky, Y. M., Belopolskaya, Y. I., Bogdansky, Y. V., Lyubashenko, V. V., & Mitropolsky, Y. A. (1999). Mathematical heritage of Yuri L’vovich Daletskii. Methods of Functional Analysis and Topology, 5(4), 1-8. https://zen.imath.kiev.ua/index.php/mfat/article/view/102