S. K.  Apte, Garaje, S. N., Naik, S. D., Waichal, R. P., and Kale, B. B., ?Environmentally benign enhanced H-2 production from abundant copious waste H2S using size tuneable cubic bismuth (Bi-0) quantum dots-GeO2 glass photocatalyst under solar light?, Green Chemistry, vol. 15, no. 12, pp. 3459-3467, 2013.