%0 Journal Article %A Y. Eliashberg %T Classification of overtwisted contact structures on 3-manifolds. %J Inventiones mathematicae %D 1989 %P 623-638 %V 98 %N 1 %I mathdoc %U http://geodesic.mathdoc.fr/item/IM_1989__98_1_143746/ %F IM_1989__98_1_143746