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Geer, Russell Mortimer (1936). “Second Thoughts on the Imperial Succession from Nerva to Commodus” (subscription required). Transactions and Proceedings of the American Philological Association (The Johns Hopkins University Press) 67: 47?54. doi:10.2307/283226. JSTOR283226.
Scott Ryberg, Inez (1949). “The Procession of the Ara Pacis”. Memoirs of the American Academy in Rome19: 77, 79–101. doi:10.2307/4238621. JSTOR4238621.
Geer, Russell Mortimer (1936). “Second Thoughts on the Imperial Succession from Nerva to Commodus” (subscription required). Transactions and Proceedings of the American Philological Association (The Johns Hopkins University Press) 67: 47?54. doi:10.2307/283226. JSTOR283226.
Scott Ryberg, Inez (1949). “The Procession of the Ara Pacis”. Memoirs of the American Academy in Rome19: 77, 79–101. doi:10.2307/4238621. JSTOR4238621.
uchicago.edu
penelope.uchicago.edu
Dio Cassius 72.36.4, Loeb edition translated E. Cary
Temin, Peter (2013) (English). The Roman market economy. Princeton: Princeton University Press. pp. 13. ISBN9780691147680. OCLC784708336
Goldsworthy, Adrian Keith (2016). Pax Romana : war, peace, and conquest in the Roman world. New Haven: Yale University Press. pp. 392. ISBN9780300178821. OCLC941874968