1. Adekoya, N., Pratt, S., 2001. Fatal unintentional farm injuries among persons less than 20 years of age in the United States: geographic profiles, Department of Health and Human Services, Centers for Disease Control and Prevention, National Institute for Occupational Safety and Health, Morgantown, WV.
2. Bean, T., Wojtowicz, J., 2002. Farm Safety for Children: What Parents and Grandparents Should Know. National Agricultural Safety Database. Retrieved April 21, 2007 from http://www.cdc.gov/nasd/docs/d000101- d000200/d000134/d000134.html.
3. Injury events: utility of self-report in retrospective identification in the USA;Braun;Journal of Epidemiology and Community Health,1994
4. Breslow, N., Day, N., 1994. Statistical methods in cancer research. Volume II—the design and analysis of cohort studies. IARC Science Publication, 82, 1–406.
5. Fatal agricultural injuries in preschool children: risks, injury patterns and strategies for prevention;Brison;Canadian Medical Agricultural Journal,2006