@book { CarlLeberechtImmermann,
    title = "Carl Leberecht Immermann",
    author = "Peter {Hasubek}",
    year = "2019",
    publisher = "Peter Lang Verlag",
    address = "Berlin, Germany",
    doi = "10.3726/b10923",
    url = "https://www.peterlang.com/document/1055007"
}