Ling-Lie Chau, Wai-Yee Keung. Comments on the Parametrization of the Kobayashi-Maskawa Matrix. „Phys. Rev. Lett.”. 1984. 53. s. 1802–1805. DOI: 10.1103/PhysRevLett.53.1802. (ang.).
lbl.gov
pdg.lbl.gov
W.-M. Yao et al., J. Phys. G 33, 1 (2006) and 2007 partial update for the 2008 edition, disponible sur le site web du PDG (URL: http: //pdg.lbl.gov/), Chapter 11. The CKM Quark-Mixing Matrix.