@book { WomensadvancementintheGermanhospitalityindustrydespiteoftheglassceiling,
    title = "Women's advancement in the German hospitality industry despite of the glass ceiling",
    author = "Maike {Winkler}",
    year = "2011",
    publisher = "Diplom.de",
    address = "Hamburg, Deutschland",
    doi = "10.3239/9783842821033",
    url = "https://m.diplom.de/document/228637"
}