TY - JOUR AU - Friedrich Hirzebruch TI - Singularities and Exotic Spheres JO - Journal of Singularities PY - 2018 SP - 35 EP - 35 VL - 18 PB - mathdoc UR - http://geodesic.mathdoc.fr/articles/10.5427/jsing.2018.18c/ DO - 10.5427/jsing.2018.18c ID - 10_5427_jsing_2018_18c ER -