@book { TelecommunicationServicesinSubSaharanAfrica,
    title = "Telecommunication Services in Sub-Saharan Africa",
    subtitle = "An Analysis of Access and Use in the Southern Volta Region in Ghana",
    author = "Romeo {Bertolini}",
    year = "2002",
    publisher = "Peter Lang Verlag",
    address = "Berlin, Germany",
    url = "https://www.peterlang.com/document/1093730"
}