%0 Journal Article %A Manfredini, Maria %A Polidoro, Sergio %T Interior regularity for weak solutions of ultraparabolic equations in divergence form with discontinuous coefficients %J Bollettino della Unione matematica italiana %D 1998 %P 651-675 %V 1B %N 3 %I mathdoc %U http://geodesic.mathdoc.fr/item/BUMI_1998_8_1B_3_a9/ %G en %F BUMI_1998_8_1B_3_a9