DAVIES, T. M.; HAZELTON, M. L.; MARSHALL, J. C. sparr: Analyzing Spatial Relative Risk Using Fixed and Adaptive Kernel Density Estimation in R. Journal of Statistical Software, [S. l.], v. 39, n. 1, p. 1–14, 2011. DOI: 10.18637/jss.v039.i01. Disponível em: https://www.jstatsoft.org/index.php/jss/article/view/v039i01. Acesso em: 29 sep. 2022.