JURKOWSKA, A. A.; ŚWIERCZEWSKA-GŁADYSZ, E. Opoka – a mysterious carbonate-siliceous rock: an overview of general concepts. Geology, Geophysics and Environment, [S. l.], v. 48, n. 3, p. 257–278, 2022. DOI: 10.7494/geol.2022.48.3.257. Disponível em: https://journals.agh.edu.pl/geol/article/view/4968. Acesso em: 12 jul. 2024.