Time and time again I come back to their works for new insights." Hoare, Tony. Obituary: Edsger Wybe Dijkstra. Physics Today. March 2003, 56 (3): 96–98
。他還发明了许多有价值的天文仪器,并改进了其他仪器。 Tony Buick. Orrery: A Story of Mechanical Solar Systems, Clocks, and English Nobility. Springer Science & Business Media. 26