Hoffmann, A., Söllner, M., Fehr, A., Hoffmann, H. and Leimeister, J. M.. "Towards an Approach for Developing socio-technical Ubiquitous Computing Applications." Paper presented at the meeting of the Informatik 2011 - Informatik schafft Communities. Beiträge der 41. Jahrestagung der Gesellschaft für Informatik e.V. (GI), Berlin, Germany, 2011.

Hoffmann, H., Leimeister, J. M. and Krcmar, H.. "Anforderungen an Werkzeuge zum Prototyping von Automotive Services." Paper presented at the meeting of the Multikonferenz Wirtschaftsinformatik (MKWI) 2008, 2008.

Hoffmann, H., Leimeister, J. M. and Krcmar, H.. "A framework for developing personalizable mobile services in automobiles." Paper presented at the meeting of the 15. European Conference on Information Systems (ECIS) 2007, 2007.

Hoffmann, H., Leimeister, J. M. and Krcmar, H.. "Prototyping komplexer Geschäftsanwendungen im Automobil." Paper presented at the meeting of the Multikonferenz Wirtschaftsinformatik (MKWI) 2010, Göttingen, Germany, 2010.

Söllner, M., Hoffmann, A., Altmann, M., Hoffmann, H. and Leimeister, J. M.. "Vertrauen als Designaspekt – Systematische Ableitung vertrauensunterstützender Komponenten am Beispiel einer mobilen Anwendung." Paper presented at the meeting of the VHB Jahrestagung 2011, Kaiserslautern, Germany, 2011.

Hoffmann, H. and Leimeister, J. M.. "Evaluating Application Prototypes in the Automobile." IEEE Pervasive Computing 10 , no. 3 (2011): 43-51.

Hoffmann, A., Jandt, S., Hoffmann, H. and Leimeister, J. M.. "Integration rechtlicher Anforderungen an soziotechnische Systeme in frühe Phasen der Systementwicklung." Paper presented at the meeting of the 6. Konferenz Mobile und ubiquitäre Informationssysteme (MMS) 2011, Kaiserslautern, Germany, 2011.

Zauner, A., Hoffmann, H., Leimeister, J. M. and Krcmar, H.. "Automotive Software und Service Engineering (ASSE) - Eine Exploration von Herausforderungen und Trends aus Sicht von Branchenexperten." Paper presented at the meeting of the Mobilität und mobile Informationssysteme (MMS) 2009, Münster, Germany, 2009.

Hoffmann, A., Hoffmann, H. and Leimeister, J. M.. "Nutzerintegration in die Anforderungserhebung für Ubiquitous Computing Systeme." Paper presented at the meeting of the Workshop über Selbstorganisierende, adaptive, kontextsensitive verteilte Systeme (SAKS 2010). Electronic Communications of the EASST, Berlin, Germany, 2010.

Söllner, M., Hoffmann, A., Hoffmann, H. and Leimeister, J. M.. "Towards a Theory of Explanation and Prediction for the Formation of Trust in IT Artifacts." Paper presented at the meeting of the 10. Annual Workshop on HCI Research in MIS, Shanghai, China, 2011.

Hoffmann, H., Leimeister, J. M. and Krcmar, H.. "Automotive Service Engineering - Systematische Entwicklung personalisierbarer und interaktiver mobiler Dienste für den Automobilsektor." Paper presented at the meeting of the Wirtschaftsinformatik Konferenz (WI) 2007, Karlsruhe, 2007.

Söllner, M., Hoffmann, A., Hoffmann, H. and Leimeister, J. M.. "Vertrauensunterstützung für sozio-technische ubiquitäre Systeme." Zeitschrift für Betriebswirtschaft 2012 , no. 4 (2012): 109-140.

Hoffmann, A., Schulz, T., Hoffmann, H., Jandt, S., Roßnagel, A. and Leimeister, J.M.. "Towards the Use of Software Requirement Patterns for Legal Requirements." Paper presented at the meeting of the 2nd International Requirements Engineering Efficiency Workshop (REEW) 2012 at REFSQ 2012, Essen, Germany, 2012.

Hoffmann, A., Söllner, M. and Hoffmann, H.. "Twenty software requirement patterns to specify recommender systems that users will trust." Paper presented at the meeting of the 20th European Conference on Information Systems (ECIS), Barcelona, Spanien, 2012.

Söllner, M., Hoffmann, A., Hoffmann, H. and Leimeister, J. M.. "How to Use Behavioral Research Insights on Trust for HCI System Design." Paper presented at the meeting of the ACM SIGCHI Conference on Human Factors in Computing Systems (CHI), Austin, Texas, USA, 2012.

Hoffmann, A., Hoffmann, H. and Leimeister, J. M.. "Anforderungen an Software Requirement Pattern in der Entwicklung sozio-technischer Systeme." Paper presented at the meeting of the 42. Jahrestagung der Gesellschaft für Informatik e.V. (GI), Braunschweig, Germany, 2012.

Hoffmann, A., Söllner, M., Hoffmann, H. and Leimeister, J. M.. "Towards Trust-Based Software Requirement Patterns." Paper presented at the meeting of the Second International Workshop on Requirements Patterns (RePa' 12), Chicago, Illinois, USA, 2012.

Hoffmann, H. and Söllner, M.. "Incorporating Behavioral Trust Theory Into System Development for Ubiquitous Applications." Personal and Ubiquitous Computing (to be published) (2012): .

Hoffmann, H., Bullinger, A.C. and Fellbaum, C.. "Towards the automated evaluation of crowd work: Machine-learning based classification of complex texts simplified by laymen." Paper presented at the meeting of the 46th Hawaii International Conference on System Sciences (HICSS 2013), Grand Wailea, 2013.

Janzen, A., Hoffmann, A. and Hoffmann, H.. "Anforderungsmuster im Requirements Engineering." Paper presented at the meeting of the Working Paper Series, Nr. 2, Kassel, Germany, 2013.