@book { LeadershipinChallengingSituations,
    title = "Leadership in Challenging Situations",
    author = "Harald {Haas} and Franz {Kernic} and Andrea {Plaschke}",
    year = "2012",
    publisher = "Peter Lang Verlag",
    address = "Berlin, Germany",
    doi = "10.3726/978-3-653-01911-7",
    url = "https://www.peterlang.com/document/1045970"
}