population numbers as a function of food supply (PDF). Russel Hopfenburg, DavidPimentel, Duke University, Durham, NC, USA;2Cornell University, Ithaca, NY, USA
United Nations. esa.un.org. [2018-06-25]. (原始内容存档于2018-01-24). Pimentel, David; Pimentel, Marcia. Global environmental resources versus world population
Regenerating the Soil: From Agronomy to Agrology, Other India Press, 2005 PimentelDavid, Pimentel Marcia, Computer les kilocalories, Cérès, n. 59, sept-oct. 1977