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Mathematical and Computer Modelling > 2006 > 43 > 11-12 > 1329-1336
Mathematical and Computer Modelling > 2003 > 37 > 9-10 > 901-906
Mathematical and Computer Modelling > 2006 > 43 > 11-12 > 1329-1336
Mathematical and Computer Modelling > 2003 > 37 > 9-10 > 901-906