For various shifting types see also David Starkweather's article, “Methods of Shifting,”American String Teacher44 (Spring 1994).
2.
The role of the left hand in Popper's High School of Cello Playing is further examined in “David Popper: An Anniversary Retrospective, Part II,” by Marc Moskovitz, American String Teacher44 (Fall 1994).
3.
The technical and musical literature abounds with ways to study shifting. The student not yet prepared for the technical demands of Popper's High School of Cello Playing might, for example, try more intermediate studies such as No. 22 of Francis Grant's Intermediate Etudes in the Positions (Ludwig Publishing Company).