MathSciNet bibliographic data MR1697388 57M27 (11R04 57N10) Takata, Toshie; Yokota, Yoshiyuki The ${\rm PSU}(N)$${\rm PSU}(N)$ invariants of $3$$3$-manifolds are algebraic integers. J. Knot Theory Ramifications 8 (1999), no. 4, 521–532. Article

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