Rubismar Stolf, Jorge Hiroshi Murakami, Miguel Angelo Maniero, Marcio Roberto Soares, Luiz Carlos Ferreira da Silva, and Luiz Fernando Carrocci, “Integration of a Ruler to Measure Depth in the Design of the Stolf Impact Penetrometer: A Retrospective Study ”, CASTR-V5, pp. 28–38, Jun. 2021.