@book { RechtsfragendesCrowdfunding,
    title = "Rechtsfragen des Crowdfunding",
    author = "Michael Josef {Braun}",
    year = "2018",
    publisher = "Peter Lang Verlag",
    address = "Berlin, Germany",
    doi = "10.3726/b13217",
    url = "https://www.peterlang.com/document/1110523"
}