Music by Vladimir Sidorov.Sonata for viola and piano in 4 movements (opus 99, 2004). 1. ANDANTE. 2. ALLEGRO. 3. SCHERZO. 4. ESPRESSIVO CANTABILE.Performed Lubov Vitavskaya (viola) and Victoria Arkhangelskaya (piano). Jubilee author\'s concert by composer Vladimir Sidorov. Concert Hall of Magnitogorsk conservatoire; October, 1, 2006.