@book { TheCompleteCorrespondenceofClaraandRobertSchumann,
    title = "The Complete Correspondence of Clara and Robert Schumann",
    author = "Ronald {Crawford} and Hildegard {Fritsch}",
    year = "2012",
    publisher = "Peter Lang Verlag",
    address = "New York, United States of America",
    doi = "10.3726/978-1-4539-0998-0",
    url = "https://www.peterlang.com/document/1054375"
}