BioStor
 | New Zealand Mollusca. (Papers from Dr. Th. Mortensen's Pacific Expedition 1914-16 xix.) (1924) Videnskabelige Meddelelser Nat For Kjobenhavn 77: 1-90 |
 | A revision of the Recent Calliostoma species of New Zealand (Mollusca: Gastropoda: Trochoidea) (1995) Nautilus 108: 83-127 |