Lee M. (12 December 2014). “Smartphone Usage overtakes PCs in South Korea”, The Wall Street Journal
Meurville M.P., Pham, K., Trin C., (24 January 2015). “Tesco – shop on the go”, London Business School Case Study, Aditya Birla India Centre.
Manyika J. & Roxburgh, C. (2011). The great transformer: the impact of the Internet on economic growth and prosperity. McKinsey Global Institute.
MasterCard (2013). Online Shopping Survey Report. Singapore: MasterCard.