Applied Mathematical Modelling, vol. 37, no. 24, page. 10027 - 10035, 2013-12-15
Applied Mathematical Modelling, vol. 37, no. 20, page. 9063 - 9075, 2013-11-01
APPLIED MATHEMATICAL MODELLING, vol. 37, no. 3, page. 667 - 675, 2013-02-01