@book { PolishStateRailwaysasaModeofTransportforTroopsoftheWarsawPact,
    title = "Polish State Railways as a Mode of Transport for Troops of the Warsaw Pact",
    author = "Zbigniew {Tucholski} and Barbara {Bienias}",
    year = "2020",
    publisher = "Peter Lang Verlag",
    address = "Berlin, Germany",
    doi = "10.3726/b17291",
    url = "https://www.peterlang.com/document/1118007"
}