Figueiredo , S., T. Silva, T. Machado, J. Dias, and T. Bezerras. “Installations of Cisternas: An Analysis in the Semi-Arid Region of Paraíba State”. ITEGAM-JETIA, Vol. 3, no. 10, June 2017, pp. 116-20, https://itegam-jetia.org/journal/index.php/jetia/article/view/103.