@book { PraktischeBrauchbarkeitvonEconomicValueAdded, title = "Praktische Brauchbarkeit von Economic Value Added", author = "Christian {Wappenschmidt}", year = "2002", publisher = "Diplom.de", address = "Hamburg, Germany", doi = "10.3239/9783832456948", url = "https://m.diplom.de/document/221166" }