Ciolkowski, MarcusMarcusCiolkowskiKitchenham, BarbaraBarbaraKitchenhamRombach, H. DieterH. DieterRombach2022-03-102022-03-102007https://publica.fraunhofer.de/handle/publica/35446110.1007/978-3-540-71301-2_20enempirical software engineeringempirical validation004005006conference paper