1. Infectious Diseases of Humans: Dynamics and Control;Anderson,1991
2. Statistical Methods in Medical Research;Armitage,2002
3. Prevalence and characterization of enterohaemorrhagic Escherichia coli isolated from healthy cattle and pigs slaughtered in Santiago, Chile;Borie;Archivos De Medicina Veterinaria,1997
4. Sources of Escherichia coli O157 and experiences over the past 15 years in Sheffield, UK;Chapman;Journal of Applied Microbiology,2000
5. A 1-year study of Escherichia coli O157 in cattle, sheep, pigs and poultry;Chapman;Epidemiology and Infection,1997