V. Kumar, A. Chopra, J. Singh, R. K. Thakur, S. Srivastava, and R. Chauhan, “Comparative assessment of phytoremediation feasibility of water caltrop (Trapa natans L.) and water hyacinth (Eichhornia crassipes Solms.) using pulp and paper mill effluent”, Arch. Agric. Environ. Sci., vol. 1, no. 1, pp. 13-21, Dec. 2016.