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References
- ↑ Michael F. Singer at the Mathematics Genealogy Project
- ↑ "Maurice Sion". ias.edu.
- ↑ Morales-Ruiz, Juan J. (2004). "Review of Galois theory of linear differential equations by Marius van der Put and Michael Singer". Bull. Amer. Math. Soc. 41: 351–356. doi:10.1090/s0273-0979-04-01010-9.
