@article{CRPHYS_2012__13_2_176_0,
     author = {Pierre Sikivie},
     title = {The strong {CP} problem},
     journal = {Comptes Rendus. Physique},
     pages = {176--179},
     publisher = {Elsevier},
     volume = {13},
     number = {2},
     year = {2012},
     doi = {10.1016/j.crhy.2011.10.002},
     language = {en},
}