MEMOIRS OF THE AMERICAN MATHEMATICAL SOCIETY, vol. 260, no. 1254, page. I - +, 2019-07
DUKE MATHEMATICAL JOURNAL, vol. 151, no. 1, page. 23 - 174, 2010-01-15
ASIAN JOURNAL OF MATHEMATICS, vol. 9, no. 1, page. 1 - 17, 2005-03