%0 Journal Article %A E. Kani %T Bounds on the number of non-rational subfields of a function field. %J Inventiones mathematicae %D 1986 %P 185-198 %V 85 %I mathdoc %U http://geodesic.mathdoc.fr/item/IM_1986__85_143364/ %F IM_1986__85_143364