1. Sur la découverte de deux fossiles dans le Carbonifère de São Pedro da Cova (Portugal);Corsin;Annales de la Société Géologique du Nord,1972
2. Redescription of the Pennsylvanian trigonotarbid arachnid Lissomartus Petrunkevitch 1949 from Mazon Creek, Illinois;Dunlop;Journal of Arachnology,1995
3. Evidence for a sister group relationship between Ricinulei and Trigonotarbida;Dunlop;Bulletin of the British Arachnological Society,1996
4. Dunlop , J.A. 1997 Palaeozoic arachnids and their significance for arachnid phylogeny 65 82