1. Semiconductor Lasers: Past, Present, and Future;Agrawal,1995
2. Semiconductor Lasers (2nd revised edition);Agrawal,1993
3. An Open Access Encyclopedia for Photonics and Laser Technology http://www.rp-photonics.com/encyclopedia.html (Accessed 25 January 2012).
4. High-performance midinfrared quantum cascade lasers;Capasso;Optical Engineering,2010