1.
M. De Craen, R. Swennen, E. Keppens. Petrography and geochemistry of septarian carbonate concretions from the Boom Clay Formation (Oligocene, Belgium). njg [Internet]. 1998Jan.1 [cited 2026Apr.2];77:63-76. Available from: https://njgjournal.nl/index.php/njg/article/view/12196