SORGENFREI, T.; BUCH, A. Deep Tests in Denmark 1935-1959. Danmarks Geologiske Undersøgelse III. Række, [S. l.], v. 36, p. 1–146, 1964. DOI: 10.34194/raekke3.v36.6941. Disponível em: https://geusjournals.org/index.php/raekke3/article/view/6941. Acesso em: 2 may. 2024.