Sarkar, Satyajit, et al. “Chemical Profiling of Crush, Tear, Curl (CTC) Tea Waste of Eastern Sub-Himalayan Regions: An Elemental and Spectroscopic Analysis”. Asian Journal of Chemistry, vol. 34, no. 12, Nov. 2022, pp. 3391-8, doi:10.14233/ajchem.2022.24053.