Design Principles for a Crowd-Based Prototype Validation Platform
S. Gottschalk, M.S. Aziz, E. Yigitbas, G. Engels, in: X. Wang, A. Martini, A. Nguyen-Duc, V. Stray (Eds.), Software Business - 12th International Conference, ICSOB 2021, Drammen, Norway, December 2-3, 2021, Proceedings, Springer, 2021, pp. 205–220.

Situation- and  Domain-specific Composition and Enactment of Business Model Development Methods
S. Gottschalk, E. Yigitbas, A. Nowosad, G. Engels, in: Product-Focused Software Process Improvement, Springer, 2021.

Simplifying Robot Programming using Augmented Reality and End-User Development
E. Yigitbas, I. Jovanovikj, G. Engels, in: Proceedings of the 18th IFIP T International Conference on Human-Computer Interaction (INTERACT 2021) , Springer, 2021.

Using Augmented Reality for Enhancing Planning and Measurements in the Scaffolding Business
E. Yigitbas, S. Sauer, G. Engels, in: Proceedings of the 13th ACM SIGCHI Symposium on Engineering Interactive Computing Systems (EICS 2021), ACM, 2021.

Collaborative Software Modeling in Virtual Reality
E. Yigitbas, S. Gorissen, N. Weidmann, G. Engels, in: Proceedings of the 24th International Conference on Model Driven Engineering Languages and Systems (MODELS’21) , ACM/IEEE, 2021.

Towards a Decision Support System for Cross-Sectoral Energy Distribution Network Planning
J. Kirchhoff, S.C. Burmeister, C. Weskamp, G. Engels, in: M.H. Breitner, S. Lehnhoff, A. Nieße, P. Staudt, C. Weinhardt, O. Werth (Eds.), Energy Informatics and Electro Mobility ICT, 2021.

A Procedure Model for Enhancing Ideation in the Collaborative Development of Business Ecosystems
C. Vorbohle, S. Gottschalk, D. Kundisch, G. Engels, N. Wünderlich, in: Tagungsband Der Contribution at: 17. Internationale Tagung Wirtschaftsinformatik 2022 (WI), 2021.

VREUD - An End-User Development Tool to Simplify the Creation of Interactive VR Scenes
E. Yigitbas, J. Klauke, S. Gottschalk, G. Engels, in: Proceedings of the 2021 IEEE Symposium on Visual Languages and Human-Centric Computing (VL/HCC) , IEEE, 2021.

Generating Physically Sound Training Data for Image Recognition of Additively Manufactured Parts
T. Nickchen, S. Heindorf, G. Engels, in: 2021 IEEE Winter Conference on Applications of Computer Vision (WACV), IEEE, 2021.

Ensuring User Interface Adaptation Consistency through Triple Graph Grammers
K. Biermeier, E. Yigitbas, N. Weidmann, G. Engels, in: Proceedings of the International Workshop on Human-Centered Software Engineering for Changing Contexts of Use , 2021.

ProConAR: A Tool Support for Model-based AR Product Configuration
S. Gottschalk, E. Yigitbas, E. Schmidt, G. Engels, in: R. Bernhaupt, C. Ardito, S. Sauer (Eds.), Human-Centered Software Engineering. HCSE 2020, Springer, Cham, 2020.

Augmented and Virtual Reality Object Repository for Rapid Prototyping 
I. Jovanovikj, E. Yigitbas, S. Sauer, G. Engels, in: Proceedings of the 8th International Working Conference on Human-Centered Software Engineering (HCSE’20), Springer, 2020, pp. 216–224.

Mining Crowdsourcing Problems from Discussion Forums of Workers
Z. Nouri, H. Wachsmuth, G. Engels, in: Proceedings of COLING 2020, the 28th International Conference on Computational Linguistics, n.d., pp. 6264–6276.

Der digitale Fußabdruck, Schatten oder Zwilling von Maschinen und Menschen
G. Engels, Gruppe. Interaktion. Organisation. Zeitschrift für Angewandte Organisationspsychologie (GIO) (2020) 363–370.

A Model-Driven Mutation Framework for Validation of Test Case Migration
I. Jovanovikj, N. Weidmann, E. Yigitbas, A. Anjorin, S. Sauer, G. Engels, in: Ö. Babur, J. Denil, B. Vogel-Heuser (Eds.), Proceedings of the First International Conference on Systems Modelling and Management, ICSMM 2020 , Springer, Cham, 2020.

Modeling and Analyzing Architectural Diversity of Open Platforms
B. Jazayeri, S. Schwichtenberg, J. Küster, O. Zimmermann, G. Engels, in: Advanced Information Systems Engineering, Cham, 2020.

Experiencing and Programming the ENIAC in VR
E. Yigitbas, C.B. Tejedor, G. Engels, in: Proceedings of the Mensch Und Computer 2020 (MuC ’20), 2020.

VR Training for Warehouse Management 
E. Yigitbas, I. Jovanovikj, J. Scholand, G. Engels, in: Proceedings of the 26th ACM Symposium on Virtual Reality Software and Technology (VRST), ACM, 2020.

Model-based Product Configuration in Augmented Reality Applications
S. Gottschalk, E. Yigitbas, E. Schmidt, G. Engels, in: R. Bernhaupt, C. Ardito, S. Sauer (Eds.), Human-Centered Software Engineering. HCSE 2020, Springer, Cham, 2020.

Challenges in Model-Driven Development of Multi-Platform Augmented Reality Applications 
I. Jovanovikj, E. Yigitbas, S. Sauer, G. Engels, Softwaretechnik-Trends, Proceedings of the 22st Workshop Software-Reengineering &; Evolution (WSRE) &; 11h Workshop Design for Future (DFF) (2020).