McLoughlin, S., Bomfleur, B. and Thomas, M., 2016.
The weird world of fossil worm cocoons. Deposits Magazine, 46, pp.399-406.
https://www.researchgate.net/publication/304285376_The_weird_world_of_fossil_worm_cocoons/link/5b83a324a6fdcc5f8b6a4506/download
https://www.researchgate.net/profile/Stephen_Mcloughlin
http://www.diva-portal.org/smash/get/diva2:1047133/FULLTEXT02
McLoughlin, S., Bomfleur, B., Mörs, T. and Reguero,
M., 2016. Fossil clitellate annelid cocoons and their
microbiological inclusions from the Eocene of Seymour
Island, Antarctica. Palaeontologia Electronica, 19(1), pp.1-27.
https://palaeo-electronica.org/content/in-press/1448-eocene-annelid-cocoons
https://palaeo-electronica.org/content/pdfs/607.pdf
Yours,
Paul H.