T. Vadakel, Vinu, and C.S. Menon. “Effect of Thermal Annealing on the Optical and Photoluminescence Properties of H2PcOC8 Thin Films”. Asian Journal of Chemistry, vol. 25, no. 4, Nov. 2012, pp. 1909-12, doi:10.14233/ajchem.2013.13229.