%0 Journal Article %T Approximated solution of differentials mixed systems %A Jorge I. Casta£¿o¨CBedoya %A Jos¨¦ A. S¨¢nchez¨CCano %A Orlando Garc¨ªa¨CJaimes %J - %D 2009 %X In this paper we propose to find an approximate solution to boundary value problems and initial value differential system problems using the method of Fer developments %K differential equations %K problems of initial value %K approximate solution %K developments of Fer %U http://publicaciones.eafit.edu.co/index.php/ingciencia/article/view/61