LONG, J.; ROBERTSON, C.; NELSON, T. stampr: Spatial-Temporal Analysis of Moving Polygons in R. Journal of Statistical Software, Code Snippets, [S. l.], v. 84, n. 1, p. 1–19, 2018. DOI: 10.18637/jss.v084.c01. Disponível em: https://www.jstatsoft.org/index.php/jss/article/view/v084c01. Acesso em: 3 jul. 2022.