Taxon - Odkazy a literatura
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 [jako Petrocrania caputium Mergl, 2002]
Kraft J., Mergl M., Hroch T., Kraft P. (2015): Index of fossiliferous localities of the Mílina Formation (Lower Ordovician of the Prague Basin, Czech Republic), Folia vol. 49, No. 1-2 [jako Petrocrania caputium Mergl, 2002]