K. Prasada Rao, B. Neelima, G. Vijaya Kumar, L. Srinivas, and G. Prabhakar, “Reverse Phase High Performance Liquid Chromatography Analysis of Formoterol Fumarate in Bulk and ItsPharmaceutical Formulations”, ajc, vol. 18, no. 2, pp. 807–812, Mar. 2010.