Hegarty AC, Carsin AE, Comber H. Geographical analysis of cancer incidence in Ireland: comparison of two bayesian spatial models. Cancer Epidemiol. 2010 Aug;34(4):373-81. doi: 10.1016/j.canep.2010.04.019
Rothman KJ, Glass RL, Espinal F, Velez H. Caries-free teeth in the absence of fluoride ion. J Public Health Dent. 1972;32(4):225-8. doi: 10.1111/j.1752-7325.1972.tb03977.x