M. C. Böck, O. L. de S. da Paz, and E. V. de Paula, “Environmental impacts of unorganized cave tourism: a study on the public use of the Gruta da Lancinha – Rio Branco do Sul, State of Paraná, Brazil”, Atelie Geogr., vol. 17, no. 1, pp. 274–304, Apr. 2023, doi: 10.5216/ag.v17i1.73513.