TY JOUR TI Modern high-technological methods of forging overprinting seals and stamps in documents KW overprinting of seals KW stamps KW Flash-technology KW laser engraving on rubber KW photopolymer technology KW print plate modeling KW sign-synthesizing prints KW imitation of prints JO Vestnik of the St. Petersburg University of the Ministry of Internal Affairs of Russia AU Skripchenko, A.v. AU Ivanova, E.S. PY 2020 IS 2020 PB SAINT-PETERSBURG UNIVERSITY OF THE MINISTRY OF INTERNAL AFFAIRS OF THE RUSSIAN FEDERATION