PATIL SUNITA and MUTHUSAMY PALANISWAMY 2017. Effect of extract concentration and ageing on optical Properties of biological silver nanoparticles (Funded Work). International Journal of Pharma and Bio Sciences. 8, 3 (Sep. 2017), 686–690. DOI:https://doi.org/10.22376/ijpbs.2017.8.3.b686-690.