@book { SupervisionoverCourtsandJudges,
    title = "Supervision over Courts and Judges",
    author = "Wojciech {Piątek}",
    year = "2021",
    publisher = "Peter Lang Verlag",
    address = "Berlin, Germany",
    doi = "10.3726/b18615",
    url = "https://www.peterlang.com/document/1069034"
}