A special message from the editor-in-chief of the Condensed Matter and Interphases journal to the readers in connection with the anniversary of Ya. A. Ugai. (2021). Kondensirovannye Sredy I Mezhfaznye Granitsy = Condensed Matter and Interphases, 23(3), 307-308. https://journals.vsu.ru/kcmf/article/view/3615