Jorge Henrique Caldeira de Oliveira, et al. “Land Prices and Negotiation Patterns in Coffee Economy: Region of RibeirAo Preto Between 1874 and 1899”. Global Journal of Human-Social Science, vol. 14, no. D6, May 2014, pp. 25-34, https://socialscienceresearch.org/index.php/GJHSS/article/view/100745.