%0 Journal Article %A J.R. Cash %T On the Design of High Order Exponentially Fitted Formulae for the Numerical Integration of Stiff Systems. %J Numerische Mathematik %D 1980 %P 253-266 %V 36 %I mathdoc %U http://geodesic.mathdoc.fr/item/NUMA_1980__36_132701/ %F NUMA_1980__36_132701