Blackstone (1998). Blackstone, John (December 9, 1998). "Of Mice and Man". CBS News. New York. Archived from the original on December 11, 2013. Retrieved December 6, 2013.
Bülow (2009). Bülow, Ralf (April 28, 2009). "Auf den Spuren der deutschen Computermaus" [On the trail of the German computer mouse] (in German). Hannover: Heise Verlag GmbH & Co. KG. Archived from the original on November 27, 2013. Retrieved January 7, 2013.
SRI Staff (2008). SRI Staff (2008). "Robert Sproull (Opening remarks)". Engelbart and the Dawn of Interactive Computing: 40th Anniversary Celebration. San Francisco: SRI International. Archived from the original on September 16, 2012. Retrieved February 20, 2016.
SRI Staff (2008). SRI Staff (2008). "Robert Sproull (Opening remarks)". Engelbart and the Dawn of Interactive Computing: 40th Anniversary Celebration. San Francisco: SRI International. Archived from the original on September 16, 2012. Retrieved February 20, 2016.
Bülow (2009). Bülow, Ralf (April 28, 2009). "Auf den Spuren der deutschen Computermaus" [On the trail of the German computer mouse] (in German). Hannover: Heise Verlag GmbH & Co. KG. Archived from the original on November 27, 2013. Retrieved January 7, 2013.
Blackstone (1998). Blackstone, John (December 9, 1998). "Of Mice and Man". CBS News. New York. Archived from the original on December 11, 2013. Retrieved December 6, 2013.