@book { DieAbgrenzungmateriellerundimmateriellerWirtschaftsgter,
    title = "Die Abgrenzung materieller und immaterieller Wirtschaftsgüter",
    author = "Thorsten {Stieler}",
    year = "1999",
    publisher = "Peter Lang Verlag",
    address = "Berlin, Germany",
    url = "https://www.peterlang.com/document/1088954"
}