@book { ShrinkingCitiesEffectsonUrbanEcologyandChallengesforUrbanDevelopment,
    title = "Shrinking Cities: Effects on Urban Ecology and Challenges for Urban Development",
    author = "Marcel {Langner} and Wilfried {Endlicher}",
    year = "2007",
    publisher = "Peter Lang Verlag",
    address = "Berlin, Germany",
    doi = "10.3726/978-3-653-02080-9",
    url = "https://www.peterlang.com/document/1053645"
}