1. ÅSTRAND , P. and RODAHL , K. 1986 , inText Book of Work Physiology, Physiological bases of Exercise( McGraw-Hill ), chapter 9 , 393 – 394 .
2. GRIP TEST
3. ERGONOMICS GROUP, EASTMAN KODAC COMPANY 1986 , inErgonomic Design for People at Work, Volume 2 , ( Van Nostrand Reinhold Company ) , Appendix A , 469 .