More information (including original "Youth Technology" article; all Russian): <a href="https://surfholidays.ru/blog/popov-pervyj-serfer-v-sssr" rel="nofollow">https://surfholidays.ru/blog/popov-pervyj-serfer-v-sssr</a><p>(This article seems to get republished a lot; I don't know whether this is the original source.)