1990
Umpleby, Stuart A. “The Scientific Revolution in Demography.” Population and Environment: A Journal of Interdisciplinary Studies. Volume 11, Number 3, Spring 1990. (Paper)

1987
Umpleby, Stuart A. “World Population: Still Ahead of Schedule.” Science, Volume 287, September 1987. (Paper)

1975
Serrin, James. “Is Doomsday on Target?” Science, Volume 189, Number 4197, July 11, 1975. (Paper)

1962
von Forester, Heinz, Patricia M. Mora, and Lawrence W. Amiot. “‘Projections’ versus ‘Forecasts’ in Human Population Studies.” Science, Volume 136, Number 3511, April 13, 1962. (Paper)

1961

Because the original article received several letters in response, Science included letters in subsequent issues. (Batch 1 | Batch 2)

1960

von Forester, Heinz, Patricia M. Mora, and Lawrence W. Amiot. “Doomsday: Friday, 13 November, A.D. 2026.” Science, Volume 132, Number 3436, 1960. (Paper)

Three cartoons by Walt Kelly refered to the article. (Cartoons).

TIME Magazine article “Doomsday in 2026 A.D.” (Link)

Slides for a presentation on the Doomsday Equation (Download)