Celebratio Mathematica

S. Hawk­ing and R. Pen­rose: The nature of space and time. The Isaac New­ton In­sti­tute Series of Lec­tures. Prin­ceton Uni­versity Press, 1996. With a fore­word by Mi­chael Atiyah. MR 1372945 Zbl 0962.​83500 book

M. Atiyah: “Ro­ger Pen­rose: A per­son­al ap­pre­ci­ation,” pp. 3–​7 in The geo­met­ric uni­verse (Ox­ford, June 1996). Edi­ted by S. A. Hug­gett, L. J. Ma­son, K. P. Tod, S. Tsou, and N. M. J. Wood­house. Ox­ford Uni­versity Press (New York), 1998. MR 1634501 Zbl 0904.​01010 incollection