HEMMINGSEN SCHOVSBO, Niels; THORSHØJ NIELSEN, Arne; KLITTEN, Kurt; MATHIESEN, Anders; RASMUSSEN, Per. Shale gas investigations in Denmark: Lower Palaeozoic shales on Bornholm. GEUS Bulletin, Copenhagen, Denmark, v. 23, p. 9–12, 2011. DOI: 10.34194/geusb.v23.4794. Disponível em: https://geusbulletin.org/index.php/geusb/article/view/4794. Acesso em: 7 dec. 2025.