The Riddle of Ancient Roman Concrete, By David Moore, P.E., 1995, Retired Professional Engineer, Bureau of Reclamation (This article first appeared in "The Spillway" a newsletter of the US Dept. of the Interior, Bureau of Reclamation, Upper Colorado Region, February, 1993) نسخة محفوظة 06 ديسمبر 2017 على موقع واي باك مشين.
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Grant، Michael (1954). Roman Literature. Cambridge England: University Press. ص. 30–45. مؤرشف من الأصل في 2021-03-07.
The Riddle of Ancient Roman Concrete, By David Moore, P.E., 1995, Retired Professional Engineer, Bureau of Reclamation (This article first appeared in "The Spillway" a newsletter of the US Dept. of the Interior, Bureau of Reclamation, Upper Colorado Region, February, 1993) نسخة محفوظة 06 ديسمبر 2017 على موقع واي باك مشين.