1. Protoscolex latus, a new “worm” from Lower Ludlow beds;Bather;Annals and Magazine of Natural History,1920
2. Hadimopanella from the Lower Cambrian of North Greenland: structure and affinities;Bendix-Almgreen;Bulletin of the Geological Society of Denmark,1988
3. Some data on Milaculum Müller, 1973;Boogard;Scripta Geologica,1988
4. Isolated tubercules of some Palaeoscolecida;Boogard;Scripta Geologica,1989
5. Fauna and ecology of the Holothurian Bed, Llandrindod, Wales, UK (Darriwilian, Middle Ordovician), and the oldest articulated holothurian;Botting;Palaeontologia Electronica,2012