SBORNIK MATHEMATICS, vol. 193, no. 5-6, page. 779 - 789, 2002-05
JOURNAL OF NUMBER THEORY, vol. 122, no. 1, page. 1 - 12, 2007-01
JOURNAL FUR DIE REINE UND ANGEWANDTE MATHEMATIK, vol. 600, page. 81 - 116, 2006-01
Algebraic Geometry Day, 2012-06-18