3 well documented articles about Urban Art in Russia by Igor Ponosov :
Part 1: Attempts of art to come out into public space (1920-1990s)
Part 2: Infiltration of hip hop in the USSR. Formation and development of the street art community (1980s—2008)
Part 3: Rebirth of the Russian street art as politically and socially engaged art (2011-2012)
A final chapter is planned, check his website in the next few weeks.