1. M Asakawa and K Yazaki, Nucl. Phys. A 504, 668 (1989) A Barducci, R Casalbuoni, S De Curtis, R Gatto and G Pettini, Phys. Lett. B 231, 463 (1989)
2. K Rajagopal and F Wilczek, in: At the frontier of particle physics /Handbook of QCD edited by M Shifman (World Scientific) Vol. 3, p. 2061
3. See, e.g., FLAG working group: S Aoki et al, arXiv: 1310.8555
4. See, e.g., H J Rothe, Lattice gauge theries – An introduction (World Scientific, 2006) p. 57
5. H Neuberger, Phys. Lett. B 417, 141 (1998) D B Kaplan, Phys. Lett. B 288, 342 (1992)