Identifying Runtime Issues in Object-Oriented IEC 61131-3-Compliant Control Software using Metrics. - Eva-Maria Neumann; Birgit Vogel-Heuser; Juliane Fischer; Jonathan Keller; Iris Weiß; Sebastian Diehm; Michael Schwarz; Tobias Englert; Michael Stoll; Uwe Zell (IECON, 2020)