World J. Mech. Vol.7 No.8, August 20, 2017 DOI:10.4236/wjm.2017.78019
World J. Mech. Vol.7 No.8, August 18, 2017 DOI:10.4236/wjm.2017.78018
World J. Mech. Vol.7 No.8, July 31, 2017 DOI:10.4236/wjm.2017.78017
World J. Mech. [ISSUE], [PUBDATE] DOI:[DOI]