9Mike Eslea, Peter K. Smith. The long - term effectiveness of anti - bullying work in primary schools [ J ]. Educational Research, 1998,40 (2) :89-95.
10Barbara Sommer. Ecological and typological characteristics in early ad- olescent truancy [ J ]. The Journal of Early Adolescence, 1991,11 ( 3 ) : 379-392.
1Ng KW, Poon CW, institute of Electric and Electronic Engineer et al. Computer simulation on a typical VVVF elevator drive-scalar versus vector[C]. //Advances in Power System Control, Operation and Management, 1997. APSCOM-97. Fourth lntern~tiona] Conference on (Conf. Publ. No. 450) vol. 2. 1997.851-835.
