@book { TheStringQuartetinSpain,
    title = "The String Quartet in Spain",
    author = "Christiane {Heine} and Juan Miguel {González Martínez}",
    year = "2017",
    publisher = "Peter Lang Verlag",
    address = "Lausanne, Switzerland",
    doi = "10.3726/b10981",
    url = "https://www.peterlang.com/document/1055377"
}