1. Metal vapours in flames;Alkemade,1982
2. Quantum noise — a limit in photodetection;Bachor;Appl. Phys., B,1989
3. Bowley, H.J., 1990. Method for detecting diamond in remote locations. US patent 4 919 533.
4. Donald, G.L., 1989. Method of diamond identification. US patent 4 799 786.
5. Optoelectronic unit for the detection of diamonds by Raman light scattering;Gudaev;J. Min. Sci.,1998