MathSciNet bibliographic data MR2204279 (2006j:46064) 46L08 (28A75 46L55) Quigg, John Bundles of \$C\sp *\$$C\sp *$-correspondences over directed graphs and a theorem of Ionescu. Proc. Amer. Math. Soc. 134 (2006), no. 6, 1677–1679 (electronic). Article

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