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Witten, E. (March 13–18, 1995). Some problems of strong and weak coupling. physics.usc.edu. Future Perspectives in String Theory. Los Angeles: University of Southern California. Retrieved February 1, 2023.
Atiyah, Michael (1990). "On the Work of Edward Witten"(PDF). Proceedings of the International Congress of Mathematicians. pp. 31–35. Archived from the original(PDF) on March 1, 2017.