sentences:  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.Navarra remained in Paris for this period of self-study, and used the opportunity to meet and observe the playing of musicians such as Emanuel Feuermann, the pianist Alfred Cortot, and the violinist Jacques Thibaud.Navarra also developed friendships with composers Jacques Ibert, Florent Schmitt, and Arthur Honegger.