@book { TheHeartofMatter,
    title = "The Heart of Matter",
    author = "Peter J. {Mullan}",
    year = "2022",
    publisher = "Peter Lang Verlag",
    address = "New York, United States of America",
    doi = "10.3726/b18860",
    url = "https://www.peterlang.com/document/1266540"
}