Popov, L.; Holmer, L. E. (1994). Cambrian-Ordovician lingulate brachiopods from Scandinavia, Kazakhstan, and South Ural Mountains. <em>Fossils and Strata.</em> 35: 1-156.[details]
original descriptionPopov, L.; Holmer, L. E. (1994). Cambrian-Ordovician lingulate brachiopods from Scandinavia, Kazakhstan, and South Ural Mountains. <em>Fossils and Strata.</em> 35: 1-156.[details]