TY JOUR TI Graffiti as an example of a new kind of objects for handwritten expertise. Styles and variants KW graffiti KW styles and variants of graffiti KW object for handwritten expertise KW handwritten objects performed with the use of uncommon writing materials JO Vestnik of the St. Petersburg University of the Ministry of Internal Affairs of Russia AU Yaskina, V.E. PY 2021 IS 2021 PB SAINT-PETERSBURG UNIVERSITY OF THE MINISTRY OF INTERNAL AFFAIRS OF THE RUSSIAN FEDERATION