1. AAOS. Amer Acad Ortop Surg (1965) Joint Motion.
2. Asmussen E, Heeb�ll-Nielsen K, Molbech S (1959) Methods for evaluation of muscle strength. Comm Dan Natl Assoc Infant Par 5
3. Asmussen E, Heeb�ll-Nielsen K (1961) Isometric muscle strength of adult men and women. Comm Dan Natl Assoc Infant Par 11
4. Asmussen E, Hansen O, Lammert O (1965) The relation between isometric and dynamic muscle strength in man. Comm Dan Natl Assoc Infant Par 20
5. Beaslay WC (1961) Quantitative muscle testing. Principles and applications to research and clinical services. Arch Phys Med Rehabil 42: 398?425