JOURNAL OF HIGH ENERGY PHYSICS, vol. 0301, no. 1, page. 26, 2003-01
NUCLEAR PHYSICS B, vol. 594, no. 1-2, page. 169 - 189, 2001-01-29
NUCLEAR PHYSICS B, vol. 642, no. 1-2, page. 389 - 404, 2002-10-21