@book { DieAgrarundEnergiewende,
    title = "Die Agrar- und Energiewende",
    author = "Heinz-Jörg {Wiegand}",
    year = "2021",
    publisher = "Peter Lang Verlag",
    address = "Berlin, Germany",
    url = "https://www.peterlang.com/document/1101756"
}