1. Allison, P. A. &Briggs D. E. G. 1991. Taphonomy: Releasing the Data Locked in the Fossil Record. - 560 pp., New York, London (Plenum Press).
2. Anderson, L. I. 1996. Taphonomy and Taxonomy of the Palaeozoic Xiphosura. - Unpublished Ph.D. thesis, Univ. of Manchester. - 413 pp.
3. Anderson, L. I. &Selden, P. A. 1997. Opisthosomal fusion and phylogeny of Palaeozoic Xiphosura. -Lethaia30: 19–31, Oslo.
4. Babcock, L. E.;Wegweiser, M. D.;Wegweiser, A. E.;Stanley, T. M. &McKenzie, S. C. 1995. Devonian horseshoe crabs from northern Pennsylvania. - Pennsylvania Geology26: 2–7.
5. Bergström, J. 1975. Functional morphology and evolution of the xiphosurids. - Fossils and Strata4: 291–305, Oslo.