%0 Journal Article %A Walcher, Sebastian %T Multi-parameter symmetries of first order ordinary differential equations. %J Journal of Lie Theory %D 1999 %P 249 %V 9 %N 1 %I mathdoc %U https://geodesic-test.mathdoc.fr/item/JLT_1999__9_1_226853/ %G en %F JLT_1999__9_1_226853