5Gregory J, Zdaniuk Louay M, Chamra Pedro J. Experimental Determination of Heat Transfer and Friction in Helically-finned Tubes[J]. Experimental Thermal and Fluid Science, 2008 (32) : 761-775.
6Yusaku F. Method for Measuring Transient Friction Coefficients for Rubber Wiper Blades on Glass Surface[J]. Tribology Interna- tional, 2008 (41 ) : 17-23.
7Khattak A and Knapp K. Interstate highway crash injuries dur- ing winter snow and nonsnow events[J]. Transportation Research Record, 2001,1746 : 30-36.