@book { SonsofUlster,
    title = "Sons of Ulster",
    author = "Caroline {Magennis}",
    year = "2011",
    publisher = "Peter Lang Verlag",
    address = "Oxford, United Kingdom",
    doi = "10.3726/978-3-0353-0043-7",
    url = "https://www.peterlang.com/document/1051942"
}