1. ASFOUR , S. S. , 1980 , Energy cost prediction models for manual lifting and lowering . Unpublished Doctoral Dissertation , Texas Tech University , Lubbock , Tex .
2. AYOUB , M. M. , BETHEA , N. J. , DEIVANAYAGAM , S. , ASFOUR , S. S. , BAKKEN , G. M. , LILES , D. , MITAL , A. , and SHERIF , M. , 1978 , Determination and modeling of lifting capacity . Final Report HEW (NIOSH) Grant No. 5 R010H-000545-02 , Cincinnati , OH .
3. Effects of lifting frequency and technique on physical fatigue with special reference to psychophysical methodology and metabolic rate
4. Physiological Limits in Lifting