Taxon - Links and literature
Mergl M. (2002): Linguliformean and craniiformean brachiopods of the Ordovician (Třenice to Dobrotivá Formations) of the Barrandian, Bohemia, Acta Mus. Nat. Pragae, Ser. B, Hist. Nat., 58 (1–2): 1–82. Praha. ISSN 0036-5343 [as Rafanoglossa impar (Barrande, 1879)]
Havlíček V., Vaněk J. (1966): The Biostratigraphy of the Ordovician of Bohemia, Sborník geologických věd, Paleontologie, 8 [as Lingulella impar (Barr.)]