1. Amarakoon S., Smith J., and Segal B.: Application of Life-Cycle Assessment to Nanoscale Technology: Lithium-ion Batteries for Electric Vehicles (US Environmental Protection Agency). Available at: https://www.epa.gov/sites/production/files/2014-01/documents/ lithium_batteries_lca.pdf (accessed April 24, 2013).
2. Suresh Gandhi M. and Raja M.: Heavy mineral distribution and geochemical studies of coastal sediments between Besant Nagar and Marakkanam, Tamil Nadu, India. J. Radiat. Res. Appl. Sci. 7, 256 (2014).
3. Frankel T.C., Chavez M.R., and Ribas J.: The cobalt pipeline: Tracing the path from deadly hand-dug mines in Congo to consumer s’ phones and laptops. The Washington Post (2016). Available at: https://www.washingtonpost.com/graphics/business/batteries/ congo-cobalt-mining-for-lithium-ion-battery/ (accessed 30 September 2016).
4. Liwanga R-C.: Child miners face death for tech. CNN (2013). Available at: http://thecnnfreedomproject.blogs.cnn.com/2013/06/26/ child-miners-face-death-for-tech/ (accessed 26 June 2013).
5. Zeng X., Xu X., Boezen H.M., and Huo X.: Children with health impairments by heavy metals in an e-waste recycling area. Chemosphere 148, 408 (2016).