Čtyřruční hra: Cvičení a etudy (Four-handed Fun: Exercises and Etudes) for piano 4-hands (1972)/Piano Studies for Four Hands: 1. Repeated Tones. 2. Staccato Chords. 3. Legato Chords. 4. Arpeggios. 5. Complementary Rhythms. 6. Echo. 7. Little Pauses.