@book { DieRegulierungderdeutschenStromwirtschaft,
    title = "Die Regulierung der deutschen Stromwirtschaft",
    author = "Volker {Lang}",
    year = "2021",
    publisher = "Peter Lang Verlag",
    address = "Berlin, Germany",
    url = "https://www.peterlang.com/document/1088495"
}