@book { PortugalundSpanienProblemekeinerBeziehungPortugaleEspanhaEncontroseDesencontros,
    title = "Portugal und Spanien: Probleme (k)einer Beziehung. Portugal e Espanha: Encontros e Desencontros",
    author = "Tobias {Brandenberger} and Henry {Thorau}",
    year = "2021",
    publisher = "Peter Lang Verlag",
    address = "Berlin, Germany",
    url = "https://www.peterlang.com/document/1099612"
}