M. M. Ayad, H. E. Abdellatef, M. M. Hosny, and Y. A. Sharaf, “DETERMINATION OF ETILEFRINE HYDROCHLORIDE, FENOTEROL HYDROBROMIDE, SALBUTAMOL SULPHATE AND ESTRADIOL VALERATE USING SURFACE PLASMON RESONANCE BAND OF SILVER NANOPARTICLES”, Int J Pharm Pharm Sci, vol. 7, no. 5, pp. 327–333, May 2015.