Phillips, John. Palæozoic series. Penny Cyclopaedia of the Society for the Diffusion of Useful Knowledge 17. London: Charles Knight and Co. 1840: 153–54 [2023-12-07]. （原始内容存档于2023-07-02）. "As many systems or combinations of organic forms as are clearly traceable in the stratified crust of the globe, so many corresponding terms (as Palæozoic, Mesozoic, Kainozoic, &c.) may be made, … "
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Tang, Carol Marie. Mesozoic Era. Encyclopædia Britannica. Encyclopædia Britannica. [5 September 2019]. （原始内容存档于2015-07-04）.
Phillips, John. Palæozoic series. Penny Cyclopaedia of the Society for the Diffusion of Useful Knowledge 17. London: Charles Knight and Co. 1840: 153–54 [2023-12-07]. （原始内容存档于2023-07-02）. "As many systems or combinations of organic forms as are clearly traceable in the stratified crust of the globe, so many corresponding terms (as Palæozoic, Mesozoic, Kainozoic, &c.) may be made, … "
