%0 Journal Article %A W. Sinnott %T On the ?-invariant of the ?-transform of a rational function. %J Inventiones mathematicae %D 1984 %P 273-282 %V 75 %I mathdoc %U http://geodesic.mathdoc.fr/item/IM_1984__75_143097/ %F IM_1984__75_143097