@book { MalariainAfrica,
    title = "Malaria in Africa",
    subtitle = "Challenges for Control and Elimination in the 21 st  Century",
    author = "Olaf {Müller}",
    year = "2011",
    publisher = "Peter Lang Verlag",
    address = "Berlin, Germany",
    url = "https://www.peterlang.com/document/1108755"
}