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↑ Muhly, Paul S. (1983). "Review: Subnormal operators , by John B. Conway" . Bull. Amer. Math. Soc. (NS) . 8 (3): 511– 515. doi : 10.1090/s0273-0979-1983-15144-3 .
↑ Gamelin, TW (1993). "Review: The theory of subnormal operators , by John B. Conway" . Bull. Amer. Math. Soc. (NS) . 28 (1): 199– 202. doi : 10.1090/s0273-0979-1993-00355-0 .