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Summers, Huw, L. Raddatz, I.H White, H.D Summers, K.H Hahn, M.R Tan, and S.-Y Wang. "Measurement of Guiding Effects in Vertical-cavity Surface-emitting Lasers." IEEE Photonics Technology Letters 8, no. 6 (1996): 743-745.

Summers, Huw, et al. "Measurement of Guiding Effects in Vertical-cavity Surface-emitting Lasers." IEEE Photonics Technology Letters 8.6 (1996): 743-745.