Typically, an English full text is available in about 1 month from the date of publication of the original article.

PACS: 01.60.+q DOI: 10.3367/UFNe.2026.08.040178 URL: https://ufn.ru/en/articles/2026/9/g/ Citation: UFN Editorial Board "Mikhail Valentinovich Kovalchuk (on his 80th birthday)" Phys. Usp. 69 (9) (2026) Accepted: 21st, August 2026 Оригинал: Редколлегия УФН «Михаил Валентинович Ковальчук (к 80-летию со дня рождения)» УФН 196 1009–1010 (2026); DOI: 10.3367/UFNr.2026.08.040178 M.V. Kovalchuk is author of Physics-Uspekhi