@book { ActinginConcertimRahmenderOffenlegungsundAngebotspflicht,
    title = "Acting in Concert im Rahmen der Offenlegungs- und Angebotspflicht",
    author = "Robert {Mai}",
    year = "2012",
    publisher = "Peter Lang Verlag",
    address = "Berlin, Germany",
    doi = "10.3726/978-3-653-01297-2",
    url = "https://www.peterlang.com/document/1046062"
}