Neutron Electric Dipole Moment and Spontaneous CP Breaking
  In a model where CP is spontaneously broken, the aspon model, it is shown by extending previous arguments about B decay and the value of $Re(\epsilon^{'}/\epsilon)$ in the kaon system, that the neutron electric dipole moment $D_n$ is bounded from below by $D_n \geq 10^{-29}$e.-cm. 
Paul H. Frampton and Masayasu Harada