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References
- ↑ Joel Shapiro at the Mathematics Genealogy Project
- ↑ P. S. Bourdon and J. H. Shapiro, Mem. Amer. Math. Soc. 125 (1997), no. 596, pp. 1-105
- ↑ J. H. Shapiro, The essential norm of a composition operator. Ann. of Math. (2) 125 (1987), no. 2, 375–404.
