Spontaneous CP violating phase as the CKM matrix phaseShao-Long Chen, N.G. Deshpande, Xiao-Gang He, Jing Jiang and Lu-Hsing TsaiEur. Phys. J. C, 53 4 (2008) 607-614DOI: https://doi.org/10.1140/epjc/s10052-007-0509-y