1. Etawell, J., Murray, M., Newman, P.: The New Palgrave: A Dictionary of Economics. The Macmillan Press Limited, London (1991)
2. AmitSaha: A study on “The impact of online shopping upon retail trade business”. J. Bus. Manage. 74–78 (2011)
3. Rowley, J.: An analysis of the e-service literature: towards a research agenda. Internet Res. 16(3), 339–359 (2006)
4. Brynjolfsson, E., Hu, Y., Smith, M.: Consumer surplus in the digital economy: estimating the value of increased product variety at online booksellers. Manage. Sci. 49(11), 1580–1596 (2003)
5. Yarimoglu, E.K.: A review of service and e-service quality measurements: previous literature and extension. J. Econ. Soc. Stud. (2014)