Modelling Foundations and Applications : 13th European Conference, ECMFA 2017, Held as Part of STAF 2017, Marburg, Germany, July 19-20, 2017, Proceedings /: 13th European Conference, ECMFA 2017, Held as Part of STAF 2017, Marburg, Germany, July 19-20, 2017, Proceedings. (2017)