@article{Frezzotti:2005Pi,
  author = "Frezzotti, Roberto  and  Rossi, Giancarlo",
  title = "{Four quark operators in maximally twisted Wilson LQCD }",
  doi = "10.22323/1.020.0342",
  journal = "PoS",
  year = 2005,
  volume = "LAT2005",
  pages = "342"
}