MathSciNet bibliographic data MR2097289 (2005m:18007) 18D10 (16W30) Etingof, Pavel; Nikshych, Dmitri; Ostrik, Viktor An analogue of Radford's \$S\sp 4\$$S\sp 4$ formula for finite tensor categories. Int. Math. Res. Not. 2004, no. 54, 2915–2933. Article

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