@book { SocialMedia,
    title = "Social Media",
    author = "Mario {Anastasiadis} and Caja {Thimm}",
    year = "2011",
    publisher = "Peter Lang Verlag",
    address = "Berlin, Germany",
    doi = "10.3726/978-3-653-01083-1",
    url = "https://www.peterlang.com/document/1054083"
}