Hewitt, R.; Pedley, H. M. (1978). "The preservation of the shells of Sepia in the middle Miocene of Malta". Proceedings of the Geologists' Association. 89 (3): 227–237. Bibcode:1978PrGA...89..227H. doi:10.1016/S0016-7878(78)80013-3.
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Hewitt, R.; Pedley, H. M. (1978). "The preservation of the shells of Sepia in the middle Miocene of Malta". Proceedings of the Geologists' Association. 89 (3): 227–237. Bibcode:1978PrGA...89..227H. doi:10.1016/S0016-7878(78)80013-3.
