@book { WillyHaas,
    title = "Willy Haas",
    author = "Jyoti {Sabharwal}",
    year = "2013",
    publisher = "Peter Lang Verlag",
    address = "Berlin, Germany",
    doi = "10.3726/978-3-653-02791-4",
    url = "https://www.peterlang.com/document/1047504"
}