| British Chalk Chondrichthyes, by Robert Randell: http://www.chalk.discoveringfossils.co.uk/ |
| Fossils
of the Gault Clay and Folkestone Beds (Albian) in the
county of Kent, south-east England. A very interesting sharks and rays
section! http://www.gaultammonite.co.uk/ |
| Lower
Eocene fossils of the London Clay from the North coastal section of the
Isle of Sheppey, Kent, UK. A good sharks and rays section! http://www.sheppeyfossils.com/ |
| Chondrichthyan teeth from the Paleogene of Kiev, Ukraine, by Stanislav Dobrovolskiy: https://sites.google.com/site/kyivzub |
| Geologica Belgica: http://popups.ulg.ac.be/Geol.htm |
| Netherlands Journal of Geosciences / Geologie en Mijnbouw: http://www.njgonline.nl/ |
| Royal Belgian Institute of Natural Sciences: http://www.naturalsciences.be/ |
| Dutch National Museum of Natural History: http://www.naturalis.nl |
| Belgische Vereniging voor Paleontologie (BVP): http://www.paleontologie.be/ |
| The Tertiary Research Group (UK): http://www.trg.org/ |
Werkgroep voor Tertiaire en Kwartaire Geologie (WTKG): https://www.wtkg.org/ |
| Palaeo-Publishing & -Library: http://www.palaeontos.be/ |
| The International Commission on Stratigraphy (ICS): http://www.stratigraphy.org/ |
| The International Commission on Zoological Nomenclature (ICZN): http://www.iczn.org/ |
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