Science. 1960 Nov 4;132:1291-5.
Doomsday: Friday, 13 November, A.D. 2026. At this date human population will approach infinity if it grows as it has grown in the last two millenia.
VON FOERSTER H, MORA PM, AMIOT LW.
PMID: 13782058 [PubMed - indexed for MEDLINE]