Mihaljević, M.; Jerjen, I.; Smith, A. B. The Test Architecture of Clypeaster (Echinoidea, Clypeasteroida) and Its Phylogenetic Significance MORANA MIHALJEVIĆ (Switzerland), IWAN JERJEN (Switzerland) &Amp; ANDREW B. SMITH (UK). Zootaxa 2011, 2983, 21–38.