BouldingKenneth E.1968“The city as an element in the international system”. Daedalus97 (Fall): 1111–1123.
2.
DurkheimEmile1933The Division of Labor in Society (SimpsonG., trans.). New York: Free Press.
3.
HaldA.1952Statistical Theory with Engineering Applications. New York: John Wiley.
4.
MurdockGeorge Peter1959Africa: Its Peoples and Their Culture History. New York: McGraw-Hill.
5.
SchmidtElseMattinglyPaul1966Population Density in Africa about 1960. Berlin: Georg Westermann Verlag.
6.
StephanG. Edward1970“Variation in county size: A theory of segmental growth”. Amer. Soc. Rev.36 (June): 451–461.
7.
StephanG. Edward1972“International tests of the size-density hypothesis”. Amer. Soc. Rev.37 (June): 365–368.
8.
StephanG. EdwardWrightStephen M.1973“Indian tribal territories in the Pacific Northwest: A cross-cultural test of the size-density hypothesis”. Annals of Regional Sci.7 (June): 113–123.
9.
StinchcombeArthur1968Constructing Social Theories. New York: Harcourt, Brace & World.