%0 Journal Article %A Friedrich Hirzebruch %T Singularities and Exotic Spheres %J Journal of Singularities %D 2018 %P 35-35 %V 18 %I mathdoc %U http://geodesic.mathdoc.fr/articles/10.5427/jsing.2018.18c/ %R 10.5427/jsing.2018.18c %F 10_5427_jsing_2018_18c