Apt, Krzysztof R.. (2002). «Edsger Wybe Dijkstra (1930 - 2002): A portrait of a genius» Formal Aspects of Computing 14 (2): 92–98. doi:10.1007/s001650200029..
O'Connor, J. J.; Robertson, E. F.. (July 2008). «Dijkstra biography»MacTutor (School of Mathematics and Statistics, University of St Andrews, Scotland).