Cederström, P.; Geyer, G.; Ahlberg, P.; Nilsson, C. H.; Ahlgren, J. (2022). Ellipsocephalid trilobites from Cambrian Series 2 and Stage 4, with emphasis on the taxonomy, morphological plasticity and biostratigraphic significance of ellipsocephalids from Scania, Sweden. Fossils and Strata Series. 67: 1-131. ISBN 978-8-215-06576-2.
Cederström, P.; Geyer, G.; Ahlberg, P.; Nilsson, C. H.; Ahlgren, J.
2022
Ellipsocephalid trilobites from Cambrian Series 2 and Stage 4, with emphasis on the taxonomy, morphological plasticity and biostratigraphic significance of ellipsocephalids from Scania, Sweden