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Saenger, Wolfram; Jacob, Joël; Gessler, Katrin; Steiner, Thomas; Hoffmann, Daniel; Sanbe, Haruyo; Koizumi, Kyoko; Smith, Steven M.; Takaha, Takeshi (1998-01-01). "Structures of the Common Cyclodextrins and Their Larger AnaloguesBeyond the Doughnut". Chemical Reviews. 98 (5): 1787–1802. doi:10.1021/cr9700181. PMID11848949.