KELLER, E. Et Al. Maximum Torque and Muscle Strain While Using Screwdrivers with Clean and Contaminated Surfaces in Bi-Directional Use. 2007. In ASSESSMENT OF THE ERGONOMIC QUALITY OF HAND-HELD TOOLS AND COMPUTER INPUT DEVICES , IOS Press , Amsterdam, 173-181.

KELLER, E., ÖZALP, B. T., & STRASSER, H., (2007). Maximum Torque and Muscle Strain While Using Screwdrivers with Clean and Contaminated Surfaces in Bi-Directional Use. ASSESSMENT OF THE ERGONOMIC QUALITY OF HAND-HELD TOOLS AND COMPUTER INPUT DEVICES (pp.173-181), Amsterdam: IOS Press .

KELLER, ERWIN, BESİM TÜRKER ÖZALP, And HELMUT STRASSER. "Maximum Torque and Muscle Strain While Using Screwdrivers with Clean and Contaminated Surfaces in Bi-Directional Use." In ASSESSMENT OF THE ERGONOMIC QUALITY OF HAND-HELD TOOLS AND COMPUTER INPUT DEVICES , 173-181. Amsterdam: IOS Press , 2007

KELLER, ERWIN Et Al. "Maximum Torque and Muscle Strain While Using Screwdrivers with Clean and Contaminated Surfaces in Bi-Directional Use." ASSESSMENT OF THE ERGONOMIC QUALITY OF HAND-HELD TOOLS AND COMPUTER INPUT DEVICES , IOS Press , 2007, pp.173-181.

KELLER, E. ÖZALP, B. T. And STRASSER, H. (2007) "Maximum Torque and Muscle Strain While Using Screwdrivers with Clean and Contaminated Surfaces in Bi-Directional Use", ASSESSMENT OF THE ERGONOMIC QUALITY OF HAND-HELD TOOLS AND COMPUTER INPUT DEVICES . Amsterdam: IOS Press .

@bookchapter{bookchapter, author ={ERWIN KELLER Et Al. }, chaptertitle={Maximum Torque and Muscle Strain While Using Screwdrivers with Clean and Contaminated Surfaces in Bi-Directional Use}, booktitle={ ASSESSMENT OF THE ERGONOMIC QUALITY OF HAND-HELD TOOLS AND COMPUTER INPUT DEVICES}, publisher={IOS Press }, city={Amsterdam},year={2007} }