COMMUNICATIONS ON PURE AND APPLIED MATHEMATICS, vol. 65, no. 6, page. 790 - 832, 2012-06
BULLETIN OF THE LONDON MATHEMATICAL SOCIETY, vol. 44, page. 443 - 450, 2012-06
ALGEBRAIC AND GEOMETRIC TOPOLOGY, vol. 12, no. 2, page. 963 - 977, 2012-01