Voerkelius, Susanne, et al. “INVESTIGATIONS WATER MANAGEMENT AND WATER QUALITY IN PICOS PIAUÍ AND TAUÁ CEARÁ WITHIN THE BILATERAL WAVES PROGRAM IN NORTHEAST BRAZIL”. Águas Subterrâneas, setembro de 2000, https://aguassubterraneas.emnuvens.com.br/asubterraneas/article/view/24306.