1. Social innovation and SONO filter for drinking water;Society and Business Review,2018
2. Alternate Fuels Data Center (AFDC) (2020a), “How do hybrid electric cars work?”, available at: https://afdc.energy.gov/vehicles/how-do-hybrid-electric-cars-work (accessed 29 July 2020).
3. Alternate Fuels Data Center (AFDC) (2020b), “How do plug-in hybrid electric cars work?”, available at: https://afdc.energy.gov/vehicles/how-do-plug-in-hybrid-electric-cars-work (accessed 29 July 2020).
4. Alternate Fuels Data Center (AFDC) (2020c), “How do all-electric cars work?”, available at: https://afdc.energy.gov/vehicles/how-do-all-electric-cars-work (accessed 29 July 2020).
5. The diffusion of the Internet: a cross-country analysis;Telecommunications Policy,2010