International Youth Conference on Electronics, Telecommunications and Information Technologies : Proceedings of the YETI 2021, St. Petersburg, Russia / by International Youth Conference on Electronics, Telecommunications and Information Technologies (2021 : Saint Petersburg, Russia), Velichko, Elena, editor 650937, Kapralova, Viktoria, editor 650938, Karaseov, Platon, editor 650939, Zavjalov, Sergey, editor 650940, Angueira, Pablo, 1972-, editor 650941, Andreev, Sergey, editor 559985