Original: Part VIc. Remarks on Interpretation, Remarks on Tremolendo, 40 Duettinos on Bohemian Melodies for 2 Violins. Ševčík, Otakar. Book II.
Translation: School of Intonation on an Harmonic Basis for Violin, Op.11. Elementary Studies from the 2nd to the 7th Position. Scores.