Degradation functions for railway station equipment quality based on maintenance-influenced data. - Maren Maus; Felix Lampe; Nadine Friesen; Mark Heckmann; Lea Elfert; Nils Nießen (CASE, 2021)

OpenRepGrid.ic: A software for Interpretive Clustering. - Mark Heckmann; Viv Burr; Nigel King (J. Open Source Softw., 2023)

OpenRepGrid: An R Package for the Analysis of Repertory Grid Data. - Mark Heckmann (J. Open Source Softw., 2024)