The following bibliography has been generated by bringing together all references provided by our content partners. There may be duplication.
- Kroh, A. & Smith, A.B. (2010): The phylogeny and classification of post-Palaeozoic echinoids. Journal of Systematic Palaeontology, 8/2: 147-212.
- Kroh, A. (2015). Irregularia. Accessed through: World Register of Marine Species at http://www.marinespecies.org/aphia.php?p=taxdetails&id=510499
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