J.Hamood, Farah, et al. “Influence of Annealing Temperature on Structural and Optical Properties of SnS:Ag Thin Film for Solar Cell Application”. International Journal of Engineering & Technology, vol. 7, no. 4.36, Dec. 2018, pp. 296-9, https://doi.org/10.14419/ijet.v7i4.36.23791.