Mario Rogelio Flores-Méndez, Marcos Postigo-Boix, José Luis Melús-Moreno, Burkhard Stiller: A Model for the Mobile Market based on Customers Profile to Analyze the Churning Process; Springer, Wireless Networks, Vol. 22, No. 8, August 2016, ISSN 1022-0038, pp 1-14. doi:10.1007/s11276-016-1334-8 URL: https://www.google.ch/url?sa=t&rct=j&q=&esrc=s&source=web&cd=1&cad=rja&uact=8&ved=0ahUKEwiChvaKs7bOAhVJJcAKHZPbCYEQFggeMAA&url=http%3A%2F%2Flink.springer.com%2Fcontent%2Fpdf%2F10.1007%252Fs11276-016-1334-8.pdf&usg=AFQjCNGQI2goh_jol1xope6xfJCtHERNxA.