@book { ProcessPerformanceManagement,
    title = "Process Performance Management",
    author = "Peter {Muschick}",
    year = "2012",
    publisher = "GRIN Verlag",
    address = "München, Germany",
    doi = "10.3239/9783656125785",
    url = "https://www.hausarbeiten.de/document/188744"
}