This included transcribing many of the violin technical methods to make up for a lack of decent cello études, including those of Carl Flesch and Otakar Ševčík.
He was a student and "first American Representative" of Otakar Ševčík who created a leading pedagogical method for teaching violin that is still widely used today.
Otakar Ševčík | Sevcik v. Sandoval | Ševčík-Lhotský Quartet |