Reference

Baba Senowbari-Daryan, Koorosh Rashidi, M. Amirzadeh, B. Saberzadeh, A. Talebi (2011): Sponges from the Upper Triassic (Norian-Rhaetian) Nayband Formation, Northeast Iran – Jahrbuch der Geologischen Bundesanstalt – 151: 355 - 374.