8Sommerfeld J L and Meyer R A. Correlation and accuracy of a wheel force transducer as developed and tested on a flat-trac Tire Test System[Z] [M]. SAE, 1999 01-0938
9I Crystal Version 6.0 Edition for C++-Symbian Developers library.http://www.symbian.com/, 2001
10FENG Song, OUYANG Xin, HUANG Oing-song. Design and Implementation of Intelligent Short Message [J]. Journal of Kunming University of Science and Technology (Science and Technology), 2007, 32(5): 43-47