Elma Doflein & Erich Doflein 
The Doflein Method [PDF ebook] 
The Violinist’s Progress. The higher positions (4th to 10th positions)

Part I: The fourth position: Chapter 1: Studies in the 4th position – Chapter 2: The 4th position combined with the lower positions – Chapter 5: Application of the 4th position – Part II: The fifth position: Chapter 6: Studies in the 5th position – Chapter 7: The fifth position combined with the lower positions – Part II: Sixth to tenth positions: Chapter 8: The sixth position and its application – Chapter 9: The seventh position – Chapter 10: Exercises and examples in application of the 8th, 9th and 10th positions – Part IV: Techniques of stopping in modern music