Summers, H., Smowton, P., Herrmann, E., Ning, Y., Summers, H., Blood, P., & Hopkinson, M. (2001). Optical mode loss and gain of multiple-layer quantum-dot lasers. Applied Physics Letters, 78(18), p. 2629. doi:10.1063/1.1366652

Summers, Huw, P.M Smowton, E. Herrmann, Y. Ning, H.D Summers, P. Blood, and M. Hopkinson. "Optical Mode Loss and Gain of Multiple-layer Quantum-dot Lasers." Applied Physics Letters 78, no. 18 (2001): 2629.

Summers, Huw, et al. "Optical Mode Loss and Gain of Multiple-layer Quantum-dot Lasers." Applied Physics Letters 78.18 (2001): 2629.