LINY P, et al. “Preparation Of Gold Nanoparticles From Helianthus Annuus (Sun Flower) Flowers And Evaluation Of Their Antimicrobial Activities”. International Journal of Pharma and Bio Sciences, vol. 3, no. 1, Mar. 2012, pp. 430-8, https://ijpbs.net/index.php/journal/article/view/1204.