1. Neil J. Cornish, David N. Spergel, Glenn D. Starkman, and Eiichiro Komatsu, Constraining. the Topology of the Universe, Phys. Rev. Lett. 92 (2004), 201–302, astroph/0310233
2. V. Rivasseau and F. Vignes-Tourneret, Non-Commutative Renormalization, in Rigorous Quantum Field Theory, a Festschrift for Jacques Bros, Birkhäuser Progress in Mathematics Vol. 251, 2007, hep-th/0409312.
3. M. Peskin and Daniel V. Schroeder (Contributor), An Introduction to Quantum Field. Theory, Perseus Publishing, (1995).
4. C. Itzykson and J.-B. Zuber, Quantum Field Theory, McGraw Hill, 1980.
5. P. Ramond, Field Theory, Addison-Wesley, 1994.