Taagepera, Rein (1979). "Size and Duration of Empires: Growth-Decline Curves, 600 B.C. to 600 A.D.". Social Science History. 3 (3/4): 121–122, 124–125, 127–129, 132–133. doi:10.2307/1170959. JSTOR 1170959.
jstor.org
Taagepera, Rein (1979). "Size and Duration of Empires: Growth-Decline Curves, 600 B.C. to 600 A.D.". Social Science History. 3 (3/4): 121–122, 124–125, 127–129, 132–133. doi:10.2307/1170959. JSTOR 1170959.