Brenno Ambrosini has lauded the work of which former Soviet composer and pianist?
Brenno Ambrosini:  He has championed the piano music of Soviet contemporary composers such as Arvo Pärt, Sofia Gubaidulina, Boris Tishchenko and Alfred Schnittke, and has kept a close artistic relationship with local composers such as Francisco Llácer Pla. Boris Tishchenko: Boris Ivanovich Tishchenko (Russian Бори́с Ива́нович Ти́щенко; 23 March 1939 – 9 December 2010) was a Russian and Soviet composer and pianist.
Boris Ivanovich Tishchenko