@book { AdolphvonHenselt,
    title = "Adolph von Henselt",
    subtitle = "Ein Leben für die Klavierpädagogik in Rußland",
    author = "Natalia {Keil-Zenzerova}",
    year = "2007",
    publisher = "Peter Lang Verlag",
    address = "Berlin, Germany",
    url = "https://www.peterlang.com/document/1100864"
}