JOURNAL OF DIFFERENTIAL EQUATIONS, vol. 247, no. 6, page. 1915 - 1948, 2009-09-15
Discrete and Continuous Dynamical Systems Series-B, vol. 18, no. 3, page. 681 - 691, 2013-05
SIAM JOURNAL ON MATHEMATICAL ANALYSIS, vol. 36, no. 1, page. 121 - 171, 2004-10