@book { RechnerischesUnbundlinginderStromundGasversorgung,
    title = "Rechnerisches Unbundling in der Strom- und Gasversorgung",
    author = "Heinz {Bolsenkötter} and Michael {Poullie}",
    year = "2021",
    publisher = "Peter Lang Verlag",
    address = "Berlin, Germany",
    url = "https://www.peterlang.com/document/1095000"
}