%0 Journal Article %A Adachi, Jiro %T Engel structures with trivial characteristic foliations %J Algebraic and Geometric Topology %D 2002 %P 239-255 %V 2 %N 1 %U http://geodesic.mathdoc.fr/articles/10.2140/agt.2002.2.239/ %R 10.2140/agt.2002.2.239 %F 10_2140_agt_2002_2_239