@article{Skouroupathis:2005+W,
  author = "Skouroupathis, Apostolos  and  Panagopoulos, Haralambos",
  title = "{Topological charge renormalization: A test case for 3-loop vacuum calculations using improved actions and Symanzik improved gluons}",
  doi = "10.22323/1.020.0230",
  journal = "PoS",
  year = 2005,
  volume = "LAT2005",
  pages = "230"
}