Roberts, P. D. (1992). Whatever goes around comes around. Modular invariance in string theory and conformal field theory. Chalmers Tekniska Högskola.
Chicago-Zitierstil (17. Ausg.)Roberts, Patrick D. Whatever Goes Around Comes Around. Modular Invariance in String Theory and Conformal Field Theory. Göteborg: Chalmers Tekniska Högskola, 1992.
MLA-Zitierstil (9. Ausg.)Roberts, Patrick D. Whatever Goes Around Comes Around. Modular Invariance in String Theory and Conformal Field Theory. Chalmers Tekniska Högskola, 1992.
Achtung: Diese Zitate sind unter Umständen nicht zu 100% korrekt.