6Takakura M,Nagayama T,Sakihara S,et al. Document patterns of healthrisk behavior among Japanese high school students. J of Sch Heal.2001,71(1):23-29
7Jessor J.New perspectives on adolescent risk behavior.Cambridge University Press.USA,1997
8David W, Fleming DW, Gerberding JL, et al. Youth risk behavior surveillance - United states,2001, MMWR,2002,51 (s - 4): 1 - 63
9Kann L, Warren CW, Collius JL, et al. Results from the national schoolbased 1991 youth risk behavior survey and progress toward achieving related health objectives for the nation. Public Health Report, 1993, 108(Supp 1): 47-55
