SCHOVSBO, N. H.; NIELSEN, A. T.; GAUTIER, D. L. The Lower Palaeozoic shale gas play in Denmark. GEUS Bulletin, Copenhagen, Denmark, v. 31, p. 19–22, 2014. DOI: 10.34194/geusb.v31.4640. Disponível em: https://geusbulletin.org/index.php/geusb/article/view/4640. Acesso em: 28 nov. 2021.