Journal of Pure and Applied Algebra, Volume 208, Issue 2, Feb 2007, 591-601
Journal of Pure and Applied Algebra, Volume 208, Issue 2, Feb 2007, 497-530
Advances in Mathematics 214 (2007), 92-115
Homology, Homotopy and its Applications, Vol. 10(2008), No. 1, 305-325
Algebraic & Geometric Topology, Volume 10, Issue 1, 2010, 33-63
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