Ileobaluaye Romu Apaiwoorun (Western Roman Empire) ni apaiwoorunwas ilaji Ileobaluaye Romu, latigba ipin re latowo Diokletianu ni 285; ilaji yioku Ileobaluaye Romu ni Ileobaluaye Romu Apailaorun (Eastern Roman Empire), loni ti a mo si Ileobaluaye Byisantini. Taagepera, Rein (1979). "Size and Duration of Empires: Growth-Decline Curves, 600 B.C. to 600 A.D". Social Science History 3 (3/4): 24. doi:10.2307/1170959. http://links.jstor.org/sici?sici=0145-5532%281979%293%3A3%2F4%3C115%3ASADOEG%3E2.0.CO%3B2-H.