@book { WaterTownsandPeople,
    title = "Water, Towns and People",
    subtitle = "Polish Lands against a European Background until the Mid-16th Century",
    author = "Urszula {Sowina}",
    year = "2016",
    publisher = "Peter Lang Verlag",
    address = "Berlin, Germany",
    doi = "10.3726/978-3-653-02541-5",
    url = "https://www.peterlang.com/document/1067578"
}