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Books about Kasemets:
Eesti heliloojate klaveripalu noortele. Lambit Avesson, Udo Kasemets, Diana Krull, Harry Olt, Kaljo Raid, Avo... by Lembit Avesson (1960)
Wiki information Kasemets:
Tõnis Kasemets is an Estonian racing driver and a former competitor in the CART Champ Car World Series.
Udo Kasemets was an Estonian-born Canadian composer of orchestral, chamber, vocal, piano and electroacoustic works. He was one of the first composers to adopt the methods of John Cage, and was also a conductor, lecturer, pianist, organist, teacher...