@book { PostOfficesofEurope18th21stCentury,
    title = "Post Offices of Europe 18th – 21st Century",
    author = "Muriel {Le Roux} and Sébastien {Richez}",
    year = "2014",
    publisher = "Peter Lang Verlag",
    address = "Bruxelles, Belgium",
    doi = "10.3726/978-3-0352-6456-2",
    url = "https://www.peterlang.com/document/1053838"
}