Spontaneous CP violating phase as the CKM matrix phase Shao-Long Chen, N.G. Deshpande, Xiao-Gang He, Jing Jiang and Lu-Hsing Tsai Eur. Phys. J. C, 53 4 (2008) 607-614 Published online: 08 January 2008 DOI: 10.1140/epjc/s10052-007-0509-y