1. The physiological cost of negative work;Abbott;J. Physiol.,1952
2. The multiple angle testing method for the evaluation of muscle strength;Bender;J. Bone Jt. Surg. Am.,1963
3. Leg extension at three different angles;Berger;Res. Quart.,1966
4. An interpretation of strength differences associated with varying angles of pull;Campney;Am. Assn. Hlth Phys. Educ. Res.,1965
5. Strength curves for fourteen joint movements;Clarke;J. Phys. Med. Rehab.,1950