Resonant depolarization technique at VEPP-4M in Novosibirsk Vladimir E. Blinov, Eugene B. Levichev, Sergei A. Nikitin and Ivan B. Nikolaev Eur. Phys. J. Plus, 137 6 (2022) 717 Published online: 21 June 2022 DOI: 10.1140/epjp/s13360-022-02825-1