Cherns, L. (2004). "Early Palaeozoic diversification of chitons (Polyplacophora, Mollusca) based on new data from the Silurian of Gotland, Sweden". Lethaia. 37 (4): 445–456. Bibcode:2004Letha..37..445C. doi:10.1080/00241160410002180.
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Cherns, L. (2004). "Early Palaeozoic diversification of chitons (Polyplacophora, Mollusca) based on new data from the Silurian of Gotland, Sweden". Lethaia. 37 (4): 445–456. Bibcode:2004Letha..37..445C. doi:10.1080/00241160410002180.