Encyclopedic dictionary of mathematics, 1987
Higher recursion theory / Gerald E. Sacks, 1990
Internet, http://math.mit.edu/about/history/obituaries/sacks.php, 2019-12-17
Information trouvée : Gerald Enoch Sacks, Professor Emeritus of Mathematical Logic at MIT and Harvard (1933-2019)
Internet, http://www.ams.org/news?news_id=5598, 2019-12-17
Information trouvée : Gerald Sacks (1933-2019) ; biographie
Internet, https://www.wikidata.org/wiki/Q1509840, 2021-02-02
Information trouvée : Gerald Sacks (1933-03-22/2019-10-04), logisticien américain