J. Abhiram, R. Rajaramakrishna, Y. Ruangtaweep, and J. Kaewkhao, “Effect of SnO 2 and SeO 2 in Non-linear Optical Properties of Au Nanoparticle Doped Self-striking Red Ruby Glasses”, Thai J. Nanosci. Nanotechnol., vol. 4, no. 1, pp. 12–19, Jun. 2019.