@book { WertoptimierungbeidrohenderInsolvenz,
    title = "Wertoptimierung bei drohender Insolvenz",
    author = "Markus {Kaiser}",
    year = "2001",
    publisher = "Diplom.de",
    address = "Hamburg, Deutschland",
    doi = "10.3239/9783832443122",
    url = "https://m.diplom.de/document/219915"
}