@book { AktienrckkaufundKapitalmarkt,
    title = "Aktienrückkauf und Kapitalmarkt",
    author = "Ralf {Schremper}",
    year = "2018",
    publisher = "Peter Lang Verlag",
    address = "Berlin, Germany",
    doi = "10.3726/b14005",
    url = "https://www.peterlang.com/document/1068543"
}