@book { EstoniansforEurope,
    title = "Estonians for Europe",
    author = "Pauli {Heikkilä}",
    year = "2014",
    publisher = "Peter Lang Verlag",
    address = "Bruxelles, Belgium",
    doi = "10.3726/978-3-0352-6428-9",
    url = "https://www.peterlang.com/document/1053828"
}