Rees, P., Smowton, P., Summers, H., Rees, P., Blood, P., & Summers, H. (1994). Threshold current of 670-nm AlGaInP strained quantum well lasers. IEEE Photonics Technology Letters, 6(8), pp. 910-912. doi:10.1109/68.313049

Rees, Paul, P.M Smowton, H.D Summers, P. Rees, P. Blood, and Huw Summers. "Threshold Current of 670-nm AlGaInP Strained Quantum Well Lasers." IEEE Photonics Technology Letters 6, no. 8 (1994): 910-912.

Rees, Paul, et al. "Threshold Current of 670-nm AlGaInP Strained Quantum Well Lasers." IEEE Photonics Technology Letters 6.8 (1994): 910-912.