1. Apter M. Geographic trends will shift in global laser-diode market. Laser Focus World; 2005.
2. The renaissance and bright future of fibre lasers;Tunnermann;J Phys B – At Mol Opt Phys,2005
3. Nufern. NukW: Kilowatt laser amplifier platform; 2011. [cited 2011 December].
4. Strahlungs-emission und -absorption nach der Quantentheorie;Einstein;Verh Deut Phys Ges,1916
5. Townes CH. The first laser. [cited 2011 December].