^Gaige, Jeremy (1987), Chess Personalia, A Biobibliography, McFarland, p. 191, ISBN0-7864-2353-6 Note: Chess Personalia spells his last name "Jacobsen", but this may be a typo. The entry is alphabetized as if it were spelled "Jacobson" and Gaige uses that spelling in other works such as his tournament crosstables.
^"Archived copy"(PDF). Archived from the original(PDF) on 2007-07-04. Retrieved 2012-02-19.{{cite web}}: CS1 maint: archived copy as title (link) Name Index to Jeremy Gaige's Chess Tournament Crosstables, An Electronic Edition, Anders Thulin, Malmö, 2004-09-01