POLYMER, vol. 48, no. 25, page. 7236 - 7240, 2007-11-30
COMMUNICATIONS IN MATHEMATICAL SCIENCES, vol. 7, no. 1, page. 189 - 209, 2009-03
JOURNAL OF DIFFERENTIAL EQUATIONS, vol. 230, no. 1, page. 71 - 85, 2006-11-01