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Applied Mathematics and Computation > 2010 > 217 > 1 > 92-104
Applied Mathematics and Computation > 2006 > 173 > 1 > 616-635
Nonlinear Analysis > 2005 > 61 > 6 > 1005-1013
Czechoslovak Journal of Physics > 2004 > 54 > 5 > 517-528
Czechoslovak Journal of Physics > 2003 > 53 > 2 > 89-97
Computers and Mathematics with Applications > 2002 > 44 > 10-11 > 1439-1444
Physics Letters A > 2002 > 299 > 2-3 > 179-188
Applied Mathematics-A Journal of Chinese Universities > 2001 > 16 > 2 > 149-155