1. C.T. Chen, Development of New Nonlinear Optical Crystals in the Borate Series (Harwood Academic Publishers, Switzerland, 1993)
2. C.T. Chen, B.C. Wu, A. Jiang, G.M. You, Sci. Sinica B18, 235 (1985)
3. A.R. Lim, I.G. Kim, Sol. State Commun. 159, 41 (2013)
4. G. Zhao, B. Yu, Can. J. Chem. 87, 720 (2009)
5. R.H. French, J.W. Ling, F.S. Dhuchi, C.T. Chen, Phys. Rev. B 44, 8496 (1991)