@book { BessereDaseinsvorsorgedurchRegulierungimBereichdesPNV,
    title = "Bessere Daseinsvorsorge durch Regulierung im Bereich des ÖPNV",
    author = "Dongyang {Zhang}",
    year = "2019",
    publisher = "Peter Lang Verlag",
    address = "Berlin, Germany",
    doi = "10.3726/b16152",
    url = "https://www.peterlang.com/document/1113550"
}