Koga, Guilherme Akio, et al. “User Behaviour Before Mobile Phone Disposal and Recycling in the State of São Paulo”. Future Studies Research Journal: Trends and Strategies, vol. 6, no. 2, Dec. 2014, pp. 3-29, doi:10.24023/FutureJournal/2175-5825/2014.v6i2.117.