@book { TimeSensitivityofPassengersandMarketStructureintheAirlineIndustry,
    title = "Time Sensitivity of Passengers and Market Structure in the Airline Industry",
    author = "Roland {Fischer}",
    year = "2021",
    publisher = "Peter Lang Verlag",
    address = "Lausanne, Switzerland",
    url = "https://www.peterlang.com/document/1086024"
}