Garín-Muñoz, T., C. Gijón, T. Pérez-Amaral, and R. López. “Customer Satisfaction of Mobile-Internet-Users: An Empirical Approximation for the Case of Spain”. Journal of Reviews on Global Economics, vol. 2, Dec. 2013, pp. 442-54, doi:10.6000/1929-7092.2013.02.31.