Оригинал: Sevcik, Otakar. Part IX. The Diminished Triad. School of Intonation on an Harmonic Basis for Violin. Op.11. Sevcik, Otakar.
Перевод: Sevcik, Отакар. Sevcik, Отакар. Violin solo. Part I. General Introduction. Part IIa. The Semitone and Tritone. 12 Основные Весы.