DISCRETE AND CONTINUOUS DYNAMICAL SYSTEMS-SERIES B, vol. 5, no. 2, page. 319 - 334, 2005-05
DISCRETE AND CONTINUOUS DYNAMICAL SYSTEMS-SERIES B, vol. 6, no. 6, page. 1239 - 1260, 2006-11
DISCRETE AND CONTINUOUS DYNAMICAL SYSTEMS-SERIES B, vol. 21, no. 10, page. 3479 - 3514, 2016-12