1. Effects of operator stance on pushings and pulling tasks;Ayoub;Trans. Inst. Ind. Eng.,1974
2. Physical performance and perceived exertion;Borg,1962
3. Ergonomics Guides—Ergonomics guide for assessment of human static strength;Chaffin;Amer. Ind. Hyg. Assoc. J.,1975
4. Volitional postures during maximal push/pull exertions in the sagittal plane;Chaffin;Hum. Factors,1983
5. Code of Federal Regulations;Consumer Product Safety Commission;Consumer Product-Safety Act Regulations, Commercial Practices,1985