Elicki, Olaf. «First Report of Halkieria and Enigmatic Globular Fossils from the Central European Marianian (Lower Cambrian, Gorlitz Syncline, Germany)». Spanish Journal of Palaeontology 13, no. 3 (febrero 27, 2022): 51–64. Accedido noviembre 21, 2024. https://turia.uv.es/index.php/sjpalaeontology/article/view/23978.