%0 Journal Article %A Kentaro Saji %T Koenderink type theorems for fronts %J Journal of Singularities %D 2014 %P 264-270 %V 10 %I mathdoc %U http://geodesic.mathdoc.fr/articles/10.5427/jsing.2014.10r/ %R 10.5427/jsing.2014.10r %F 10_5427_jsing_2014_10r