Master Classes Bratislav has attended:
1994 6th Summer School of the Accordion with professors Boris Lenko, Tanja Lukic, Pavel Fenjuk and Radomir Tomic (Kragujevac, Serbia)
1997 Winter School of the Accordion with lecturer Radomir Tomic (Vranje, Serbia)
2000 Winter School of the Accordion with lecturer Zoran Rakic (Vranje, Serbia)
2001 Winter School of the Accordion with lecturer Zoran Rakic (Valjevo, Serbia)
2001 Summer School of the Accordion with lecturer Zoran Rakic (Vranje, Serbia)
2003 Winter School of the Accordion with lecturer Zoran Rakic (Koviljača, Serbia)
2005 Winter School of the Accordion with lecturer Zoran Rakic (Koviljača, Serbia)
2006 Winter School of the Accordion with lecturer Zoran Rakic (Koviljača, Serbia)
2006 Seminar for Teachers and Professors of the Accordion with lecturer Vojin Vasovic (Bijeljina, Bosnia and Herzegovina)
2007 Winter School of the Accordion with lecturer Zoran Rakic (Koviljača, Serbia)
2008 Participant at the 58th World's Accordion Trophy (East Sarajevo, Bosnia and Herzegovina)
2009 Seminar "From the sound to the note" with lecturer Dr. Jurij Jastrebov (East Sarajevo, Bosnia and Herzegovina)