NIEDŹWIEDZKI, R.; SURMIK, D.; CHEĆKO, A.; SALAMON, M. A. A regurgitalite of the Middle Triassic (Muschelkalk) from Upper Silesia (Poland). Geology, Geophysics and Environment, [S. l.], v. 47, n. 1, p. 33–40, 2021. DOI: 10.7494/geol.2021.47.1.33. Disponível em: https://journals.agh.edu.pl/geol/article/view/4114. Acesso em: 4 may. 2024.