Published in Bulletin of the Natural History Museum. Geology series., in 1998, in volume 54, pages 155-163

Created: 2021-05-17, modified: 2021-05-17

Published in Bulletin of the British Museum (Natural History). Geology., in 1992, in volume 48, issue 1, pages 9-12

Created: 2013-03-01, modified: 2021-05-13