%0 Journal Article
%A Christopher,  Colin
%T Liouvillian first integrals of second order polynomial differential equations
%J Electronic journal of differential equations
%D 1999
%V 1999
%U http://geodesic.mathdoc.fr/item/EJDE_1999__1999__a62/
%G en
%F EJDE_1999__1999__a62