Dietrich, Peter, Ludwig Zschornack, e Thomas Vienken. “Critical Evaluation of Direct Push Technology for Hydrostratigraphic Aquifer Characterization”. Águas Subterrâneas (janeiro 21, 2011). Acessado abril 20, 2025. https://aguassubterraneas.emnuvens.com.br/asubterraneas/article/view/28119.