World Register of Marine Species (WoRMS)
Verhoeff, T. (2026). World Brachiopoda Database. Norelloidea Ager, 1959. Accessed through: World Register of Marine Species at: https://www.marinespecies.org/aphia.php?p=taxdetails&id=235181 on 2026-08-01
Ager, D. V. (1959). The classification of the Mesozoic Rhynchonelloidea. Journal of Paleontology. 33: 324-332.