1. Hess, H., & Messing, C. G. (2011). Treatise on Invertebrate Paleontology, Pt. T, Echinodermata 2: Crinoidea, subclass Articulata (vol. 3, revised). Kansas: Kansas University Paleontological Institute.
2. Swiss Journal of Palaeontology. (2011). Special issue: echinoderms—from the early past to the near future. A tribute to Hans Hess on his 80th birthday. Swiss Journal of Palaeontology, 130(1), 185.