@book { DieBehandlungdesAVBlockesmitdenElemaSchrittmachernEM137undEM139,
    title = "Die Behandlung des AV-Blockes mit den Elema-Schrittmachern EM 137 und EM 139",
    author = "Ann-Charlotte {Holm}",
    year = "2021",
    publisher = "Peter Lang Verlag",
    address = "Lausanne, Switzerland",
    url = "https://www.peterlang.com/document/1069204"
}