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Alan Pradel; John G. Maisey; Paul Tafforeau; Royal H. Mapes; Jon Mallatt. A Palaeozoic shark with osteichthyan-like branchial arches. Nature. 2014, 509 (7502): 608–611. PMID 24739974. S2CID 3504437. doi:10.1038/nature13195.
Iris Feichtinger; Andrea Engelbrecht; Alexander Lukeneder; Jürgen Kriwet. New chondrichthyans characterised by cladodont-like tooth morphologies from the Early Cretaceous of Austria, with remarks on the microstructural diversity of enameloid. Historical Biology: An International Journal of Paleobiology. 2018, 32 (6): 1–14. S2CID 92392461. doi:10.1080/08912963.2018.1539971.