@book { AttheoriginsofClassicalopera,
    title = "At the origins of Classical opera",
    author = "Pervinca {Rista}",
    year = "2018",
    publisher = "Peter Lang Verlag",
    address = "Lausanne, Switzerland",
    doi = "10.3726/b14367",
    url = "https://www.peterlang.com/document/1068674"
}