HANSEN, J.; HOLMER, L. E. Taxonomy and biostratigraphy of Ordovician brachiopods from northeastern Ny Friesland, Spitsbergen. Zootaxa, Auckland, New Zealand, v. 3076, n. 1, p. 1–122, 2011. DOI: 10.11646/zootaxa.3076.1.1. Disponível em: https://www.mapress.com/zt/article/view/zootaxa.3076.1.1. Acesso em: 2 may. 2025.