Computers & Mathematics with Applications
Computers and Mathematics with Applications > 2009 > 57 > 3 > 455-465
Computers and Mathematics with Applications > 2009 > 58 > 3 > 605-617
Computers and Mathematics with Applications > 2009 > 58 > 7 > 1287-1301
Computers and Mathematics with Applications > 2009 > 58 > 9 > 1755-1761