@book { Bodenzoologieundkologie,
    title = "Bodenzoologie und Ökologie",
    subtitle = "30 Jahre Umweltforschung an der Freien Universität Berlin",
    author = "Fred {Jopp} and Silvia {Pieper}",
    year = "2008",
    publisher = "Peter Lang Verlag",
    address = "Berlin, Germany",
    url = "https://www.peterlang.com/document/1104781"
}