ماخذ: Sevcik, Otakar. Part I. General Introduction. Part X. The Chord of the Dominant Seventh in All Keys. Op.11. Sevcik, Otakar.
ترجمه: Sevcik، Otakar. School of Intonation on an Harmonic Basis for Violin. Sevcik، Otakar. Violin solo. Part IIa. The Semitone and Tritone.
