Chakravarty, Amiya K.; Werner, Adrian S. - In: European Journal of Operational Research 215 (2011) 1, pp. 289-300
Early mobile phones only provided voice transmission, for a fee. They have now evolved into voice and online data portals for providing additional services through 3rd party vendors. These service providers (vendors) are given access to a customer base "owned" by the mobile phone companies, for...