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Pre One:9.  C.-H. Dong#, Y.-F. Xiao#, Y. Yang, Z.-F. Han, G.-C. Guo, and L. Yang, "Directly mapping whispering-gallery modes in microsphere through modal coupling and directional emission", Chinese Optics letters, 6, 300 (2008).

Next One:7.  C.-L. Zou, Y. Yang, C.-H. Dong, Y.-F. Xiao, Xiao-Wei Wu,  Z.-F. Han and G.-C. Guo, "Taper-microsphere coupling with numerical calculation of coupled-mode theory", JOSA B, 25, 1895 (2008).