Daniel Hoornweg, Kevin Pope (2016. szeptember 24.). „Population predictions for the world's largest cities in the 21st century” (angol nyelven). Environment and Urbanization29 (1), 195–216. o. DOI:10.1177/0956247816663557. ISSN0956-2478.
Daniel Hoornweg, Kevin Pope (2016. szeptember 24.). „Population predictions for the world's largest cities in the 21st century” (angol nyelven). Environment and Urbanization29 (1), 195–216. o. DOI:10.1177/0956247816663557. ISSN0956-2478.