6[3]Hosmer DW, Javannovic B, Lemeshow S. Best subsets logistic regression[ J ]. Biometrics, 1989, 45:1265.
7[6]Nicolosi A, Correa Leite ML, Musicco M, et al. Parenteral and sexual transmission of human immunodeficiency virus in intravenous drug users: A study of seroconversion[ J ]. Am J Epidemiol, 1992,135:225 - 233.
8MIRANDAI,PEREIRA H.The variation of chemical compositionand pulping yield with age and growth factors in youngEucalyptusglobulus. Wood and Fiber Science . 2002
9Ericc,Xu And Marcj,Sabourin.Evaluation of APMP and BCTMP for Market Pulps from South American Eucalyptus. TAPPI Journal . 1999
