Einstein metrics on exotic spheres in dimensions 7, 11 and 15. Boyer, Charles P., Galicki, Krzysztof, Kollár, János, Thomas, Evan (2005) Experimental Mathematics
Exotic smooth structures on nonpositively curved symmetric spaces. Okun, Boris (2002) Algebraic & Geometric Topology
Exotic structures on quotient spaces of S 3 -actions. Astey, L., Micha, E., Pastor, G. (1996) International Journal of Mathematics and Mathematical Sciences
Exotische Sphären als Umgebungsränder in speziellen komplexen Räumen. Helmut A. Hamm (1972) Mathematische Annalen