21 citations as recorded by crossref.

1. Palaeoecology and palaeogeography of Late Ordovician (Katian–Hirnantian) cephalopods of the Boda Limestone, Siljan district, Sweden B. Kröger & J. Ebbestad https://doi.org/10.1111/let.12034
2. Early cephalopod evolution clarified through Bayesian phylogenetic inference A. Pohle et al. https://doi.org/10.1186/s12915-022-01284-5
3. A Middle Ordovician cephalopod fauna from Cuzco Province, southern Perú and its palaeobiogeographical significance D. Evans https://doi.org/10.1002/gj.1063
4. Evidence for Palaeozoic orthoconic cephalopods with bimineralic shells K. De Baets et al. https://doi.org/10.1111/pala.12343
5. The Origin and Initial Rise of Pelagic Cephalopods in the Ordovician B. Kröger et al. https://doi.org/10.1371/journal.pone.0007262
6. Mass concentration of Hirnantian cephalopods from the Siljan District, Sweden; taxonomy, palaeoecology and palaeobiogeographic relationships B. Kröger et al. https://doi.org/10.1002/mmng.201000014
7. Ordovician Orthocerida and Pseudorthocerida (Cephalopoda: Nautiloidea) from the Lower Setul Limestone of the Langkawi Islands, Malaysia S. Niko et al. https://doi.org/10.1080/14772019.2019.1608599
8. Early growth‐stages and classification of orthoceridan Cephalopods of the Darriwillian (Middle Ordovician) of Baltoscandia B. Kröger https://doi.org/10.1080/00241160600623749
9. A Hirnantian holdover from the Late Ordovician mass extinction: phylogeny and biogeography of a new anthracocrinid crinoid from Estonia S. Cole et al. https://doi.org/10.1002/spp2.1345
10. Phylogeny of Middle–Late Ordovician lituitid cephalopods based on cladistic analysis X. Fang et al. https://doi.org/10.1080/14772019.2021.1944354
11. Pulsed cephalopod diversification during the Ordovician B. Kröger & Z. Yun-Bai https://doi.org/10.1016/j.palaeo.2008.12.015
12. Lituitid cephalopods from the upper Darriwilian and basal Sandbian (Middle–Upper Ordovician) of Estonia M. Aubrechtová & T. Meidla https://doi.org/10.1080/11035897.2020.1762723
13. Orthoceratoid and coleoid cephalopods from the Middle Triassic of Switzerland with an updated taxonomic framework for Triassic Orthoceratoidea A. Pohle & C. Klug https://doi.org/10.1186/s13358-024-00307-8
14. New reticulated and annulated cephalopods from the Ordovician of the Prague Basin (Central Bohemia) M. Aubrechtová et al. https://doi.org/10.1017/jpa.2025.10142
15. Cephalopods from the Upper Ordovician of the North Qilian Mountains region: Implications for palaeobiogeography J. Song et al. https://doi.org/10.1016/j.palwor.2025.201048
16. Chapter 27 Cambrian–Ordovician cephalopod palaeogeography and diversity B. Kröger https://doi.org/10.1144/M38.27
17. Redescription and New Information on the Carboniferous CephalopodBrachycycloceras normaleMiller, Dunbar and Condra, 1933 S. Niko & R. Mapes https://doi.org/10.2517/1342-8144-13.4.337
18. A revision of the Ordovician cephalopod Bactrites sandbergeri Barrande: Systematic position and palaeobiogeography of Bactroceras M. Aubrechtová https://doi.org/10.1016/j.geobios.2015.03.002
19. Cephalopods from reef limestone of the Vasalemma Formation, northern Estonia (latest Sandbian, Upper Ordovician) and the establishment of a local warm-water fauna B. Kröger & M. Aubrechtová https://doi.org/10.1080/14772019.2017.1347212
20. The cephalopods of the Kullsberg Limestone Formation, Upper Ordovician, central Sweden and the effects of reef diversification on cephalopod diversity B. Kröger & M. Aubrechtová https://doi.org/10.1080/14772019.2018.1491899
21. Late Ordovician cephalopods, tentaculitides, machaeridians and echinoderms from Kuh-e Faraghan, High Zagros, Iran M. Ghavidel-Syooki et al. https://doi.org/10.1080/03115518.2015.1052677