COMPASS III: teaching L2 grammar graphically on a tablet computer. - Karin Harbusch; Johannes Härtel; Christel-Joy Cameran (SLaTE, 2013)

Test-Data Generation for Xtext - Tool Paper. - Johannes Härtel; Lukas Härtel; Ralf Lämmel (SLE, 2014)

A chrestomathy of DSL implementations. - Simon Schauss; Ralf Lämmel; Johannes Härtel; Marcel Heinz; Kevin Klein 001; Lukas Härtel; Thorsten Berger (SLE, 2017)

Interconnected Linguistic Architecture. - Johannes Härtel; Lukas Härtel; Ralf Lämmel; Andrei Varanovich; Marcel Heinz (Art Sci. Eng. Program., 2017)

EMF Patterns of Usage on GitHub. - Johannes Härtel; Marcel Heinz; Ralf Lämmel (ECMFA, 2018)

Systematic Recovery of MDE Technology Usage. - Juri Di Rocco; Davide Di Ruscio; Johannes Härtel; Ludovico Iovino; Ralf Lämmel; Alfonso Pierantonio (ICMT, 2018)

Classification of APIs by hierarchical clustering. - Johannes Härtel; Hakan Aksu; Ralf Lämmel (ICPC, 2018)

Empirical study on the usage of graph query languages in open source Java projects. - Philipp Seifer; Johannes Härtel; Martin Leinberger; Ralf Lämmel; Steffen Staab (SLE, 2019)

Incremental Map-Reduce on Repository History. - Johannes Härtel; Ralf Lämmel (SANER, 2020)

Reproducible Construction of Interconnected Technology Models for EMF Code Generation. - Marcel Heinz; Johannes Härtel; Ralf Lämmel (J. Object Technol., 2020)

Understanding MDE projects: megamodels to the rescue for architecture recovery. - Juri Di Rocco; Davide Di Ruscio; Johannes Härtel; Ludovico Iovino; Ralf Lämmel; Alfonso Pierantonio (Softw. Syst. Model., 2020)

Operationalizing Threats to MSR Studies by Simulation-Based Testing. - Johannes Härtel; Ralf Lämmel (MSR, 2022)

Symbolic Execution to Detect Semantic Merge Conflicts. - Ward Muylaert; Johannes Härtel; Coen De Roover (SCAM, 2023)

Operationalizing validity of empirical software engineering studies. - Johannes Härtel; Ralf Lämmel (Empir. Softw. Eng., 2023)

Threats to Instrument Validity Within "in Silico" Research: Software Engineering to the Rescue. - Serge Demeyer; Coen De Roover; Mutlu Beyazit; Johannes Härtel (ISoLA (4), 2024)

Technical and Methodological Improvements to Mining Software Repositories. - Johannes Härtel (2024)