V. Okumus, E. Oral, D. Basaran, and A. Onay, “Simultaneous Removal of Indomethacine, Papaverine and Allopurinol from Aqueous Solution by Using Submerged Aquatic Plant Nasturtium officinale”, ajc, vol. 22, no. 3, pp. 2081–2089, Mar. 2010.