1. Palæontologia Scandinavica. Part 1, Crustacea Formationis transitionis;Angelin,1854
2. The later stages in the development of Balanoglossus kowalevskii, with a suggestion as to the affinities of the Enteropneusta;Bateson;Quarterly Journal of Microscopical Science,1885
3. Open nomenclature;Bengtson;Palaeontology,1988
4. The GSSP of the second (upper) stage of the Lower Ordovician Series: Diabasbrottet at Hunneberg, Province of Västergötland, Southwestern Sweden;Bergström;Episodes,2004
5. Index Palaeontogicus B, Enumerator Palaeontologicus;Bronn,1849