Under CopyrightMuller, E.E.MullerZenker, A.A.ZenkerHeraud, J.-A.J.-A.Heraud2022-03-0710.10.20092009https://publica.fraunhofer.de/handle/publica/29442010.24406/publica-fhg-294420en303600Entering the KIBS's black box: There must be an angel!report