@book { TransportproblemNahostGterstrmesuchenihrenWeg,
    title = "Transportproblem Nahost. Güterströme suchen ihren Weg",
    author = "Walter {Althammer}",
    year = "1976",
    publisher = "Biblion",
    address = ", Germany",
    doi = "10.3726/b12587",
    url = "https://www.peterlang.com/document/1067040"
}