@book { Ethnicdiversityandlocalgovernancequality,
    title = "Ethnic diversity and local governance quality",
    author = "Wojciech {Opioła} and Bartosz {Czepil}",
    year = "2020",
    publisher = "Peter Lang Verlag",
    address = "Berlin, Germany",
    doi = "10.3726/b16752",
    url = "https://www.peterlang.com/document/1068866"
}