適正人口
↑ Neurath, Paul (1994). From Malthus to the Club of Rome and back : problems of limits to growth, population control, and migrations. Armonk, NY [u.a.]: Sharpe. p. 6. ISBN 978-1563244070
↑ “THE POPULATION PROBLEM SINCE THE WORLD WAR: A SURVEY OF LITERATURE AND RESEARCH—Concluded VIII. THE OPTIMUM”. Journal of Political Economy (Vol. 37, No. 1 ed.). The University of Chicago Press. (Feb 1929). p. 87
↑ On the Concept of Optimum Population P. S. Dasgupta The Review of Economic Studies Vol. 36, No. 3 (Jul., 1969), pp.