O'Connor, J. J.; Robertson, E. F. (July 2008). "Dijkstra biography". MacTutor. School of Mathematics and Statistics, University of St Andrews, Scotland. Archived from the original on 11 October 2013. Retrieved 18 January 2014.
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cs.utexas.edu
Faulkner, Larry R.; Durbin, John R. (19 August 2013). "In Memoriam: Edsger Wybe Dijkstra"(PDF). University of Texas at Austin. Retrieved 20 August 2015.
O'Connor, J. J.; Robertson, E. F. (July 2008). "Dijkstra biography". MacTutor. School of Mathematics and Statistics, University of St Andrews, Scotland. Archived from the original on 11 October 2013. Retrieved 18 January 2014.