1. Alder J, Hancock A (1845–1855) A monograph of the British nudibranchiate Mollusca. Parts 1–7. Ray Society, London
2. Arey LB, Crozier WJ (1918) The “homing habits” of the pulmonate mollusk Onchidium. Proc Nat Acad Sci USA 4:319–321
3. Arey LB, Crozier WJ (1921) On the natural history of Onchidium. J Exper Zool 32:443
4. Awati PR, Karandikar KR (1948) Onchidium verraculatum (anatomy, embryology and bionomics). Zoological Memories, University of Bombay 1:1–53
5. Baba K (1938) The later development of a solenogastre, Epimenia verrucosa. J Dep Agric 6:21–41