MathSciNet bibliographic data MR2047644 20J06 (06A07 20F65 57M07) McCammond, Jon; Meier, John The hypertree poset and the \$l\sp 2\$$l\sp 2$-Betti numbers of the motion group of the trivial link. Math. Ann. 328 (2004), no. 4, 633–652. Article

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