| Remote control and concierge service for an autonomous transit vehicle fleet O Ullrich, N Rishe US Patent 9,964,948, 2018 | 169 | 2018 |
| Systems and methods for intelligent, demand-responsive transit recommendations O Ullrich, ND Rishe, D Luckerath US Patent App. 14/991,341, 2017 | 24 | 2017 |
| An Introduction to Discrete-Event Modeling and Simulation. O Ullrich, D Lückerath Simul. Notes Eur. 27 (1), 9-16, 2017 | 22 | 2017 |
| Assessing earthquake impacts and monitoring resilience of historic areas: Methods for GIS tools S Giovinazzi, C Marchili, A Di Pietro, L Giordano, A Costanzo, L La Porta, ... ISPRS International Journal of Geo-Information 10 (7), 461, 2021 | 20 | 2021 |
| Simulation and optimization of Cologne's tram schedule O Ullrich, D Lückerath, S Franz, E Speckenmeyer Simulation Notes Europe 22 (2), 69-76, 2012 | 19 | 2012 |
| Modeling time table based tram traffic D Lückerath, O Ullrich, E Speckenmeyer Simulation Notes Europe 22 (2), 61-68, 2012 | 18 | 2012 |
| The standardization process as a chance for conceptual refinement of a disaster risk management framework: the ARCH project R Lindner, D Lückerath, K Milde, O Ullrich, S Maresch, K Peinhardt, ... Sustainability 13 (21), 12276, 2021 | 12 | 2021 |
| Modellbasierte Parallelisierung von Anwendungen zur Verkehrssimulation-Ein dynamischer und adaptiver Ansatz O Ullrich Universität zu Köln, 2014 | 10 | 2014 |
| A robust schedule for Montpellier's Tramway network O Ullrich, D Lückerath, E Speckenmeyer | 10 | 2013 |
| The RESIN Climate Change Adaptation Project and its Simple Modeling Approach for Risk-oriented Vulnerability Assessment. D Lückerath, M Bogen, E Rome, B Sojeva, O Ullrich, R Worst, J Xie Simul. Notes Eur. 28 (2), 49-54, 2018 | 9 | 2018 |
| Applicability of rescheduling strategies in tram networks D Lückerath, O Ullrich, E Speckenmeyer | 9 | 2012 |
| IVAVIA Guideline, Annex to Deliverable D2. 3 Realisation and implementation of IVAVIA E Rome, M Bogen, R Worst, D Lückerath, B Sojeva, O Ullrich, H Voss, ... EU H2020 Project RESIN, Sankt Augustin, Germany, 2017 | 8 | 2017 |
| Do regular timetables help to reduce delays in tram networks? It depends! O Ullrich, D Lückerath, E Speckenmeyer Public Transport 8, 39-56, 2016 | 8 | 2016 |
| Agent-based modeling and simulation of individual traffic as an environment for bus schedule simulation O Ullrich, D Lückerath, I Proff, P Kuckertz, E Speckenmeyer Mobil.TUM 2013, 2013 | 8 | 2013 |
| Agent based modeling and simulation of a pastoral-nomadic land use system P Kuckertz, O Ullrich, A Linstädter, E Speckenmeyer Simulation Notes Europe 21 (3-4), 147-152, 2011 | 8 | 2011 |
| IVAVIA: Impact and vulnerability analysis of vital infrastructures and built-up areas E Rome, O Ullrich, D Lückerath, R Worst, J Xie, M Bogen Critical Information Infrastructures Security: 13th International Conference …, 2019 | 7 | 2019 |
| Risk-based analysis of the vulnerability of urban infrastructure to the consequences of climate change E Rome, M Bogen, D Lückerath, O Ullrich, R Worst, E Streberová, ... Critical Infrastructure Security and Resilience: Theories, Methods, Tools …, 2019 | 7 | 2019 |
| Dynamic Distributed Simulation of DEVS Models on the OSGi Service Platform M Petzold, O Ullrich, E Speckenmeyer SNE, 159, 2011 | 7* | 2011 |
| Organizational complexity as a contributing factor to underperformance U Beyer, O Ullrich Businesses 2 (1), 82-96, 2022 | 6 | 2022 |
| Emissions reduction in vehicle parking O Ullrich, ND Rishe US Patent 9,892,639, 2018 | 6 | 2018 |
