@book { IntegratedReporting,
    title = "Integrated Reporting",
    subtitle = "Useful for investors?",
    author = "Stefan {Hannen}",
    year = "2017",
    publisher = "Peter Lang Verlag",
    address = "Berlin, Germany",
    doi = "10.3726/b11722",
    url = "https://www.peterlang.com/document/1056026"
}