[1] [1] Lu Bao-sheng, Liu En-quan, Hou Xue-yuan et al.. Excited emission and self-frequency-doubling effect of NdxY1-xAl3(BO3)4 crystal. Chinese Physics Letters, 1986, 3(9):413～416

[2] [2] Aka G, Kahn-Harari A, Mougel F et al.. Linear and nonlinear-optical propeties of a new gadolinium-calcium oxyborate crystal, Ca4GdO(BO3)3. J. Opt. Soc. Am. (B), 1997, 14(9):2238～2247

[3] [3] Aka G, Kahn-Harari A, Vivien D et al.. A new non-linear and neoduminum laser self-frequency doubling crystal with congruent melting: Ca4GdO(BO3)3(GdCOB). J. Solid State Inorg Chem, 1996, 33(8):727～736