@book { LavreckijalsPotenzierterBauer,
    title = "Lavreckij als Potenzierter Bauer",
    author = "Peter {Thiergen}",
    year = "1989",
    publisher = "Biblion",
    address = ", Germany",
    doi = "10.3726/b12991",
    url = "https://www.peterlang.com/document/1067336"
}