TY JOUR TI Illegal sale of potent substances through pharmacy chains: conflict of criminal and administrative law norms KW illegal sale of potent drugs KW pharmaceutical activity KW criminal and administrative liability JO Vestnik of the St. Petersburg University of the Ministry of Internal Affairs of Russia AU Viharev, D.D. PY 2026 IS 2026 PB SAINT-PETERSBURG UNIVERSITY OF THE MINISTRY OF INTERNAL AFFAIRS OF THE RUSSIAN FEDERATION