Domik G, Scateni R. Education Programme at Eurographics 2009. In: Computer Graphics Forum. Vol 28. ; 2009:1723–1724. doi:10.1111/j.1467-8659.2009.01433.x
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Fricke H, Elsner A, Weise R, et al. Quantitative myocardial perfusion PET combined with coronary anatomy derived from CT angiography: Validation of a new fusion and visualisation software. Zeitschrift für Medizinische Physik. 2009;19(3):182-188. doi:10.1016/j.zemedi.2009.05.005
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Meixner G, Görlich D, Breiner K, et al., eds. Proceedings of the Workshop on Model Driven Development of Advanced User Interfaces (MDDAUI’09), Sanibel Island (FL, USA). Vol 439.; 2009.
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Engels G, H. Reussner R, Momm C, Sauer S, eds. Proceedings of Design for Future - 1. Workshop Des GI-Arbeitskreises “Langlebige Softwaresysteme (L2).” Vol 537. Karlsruhe; 2009.
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Eggert A, Henseler J, Hollmann S. Who Owns the Customer? Disentangling Customer Loyalty in Indirect Distribution Channels. In: Proceedings of the 17th International Colloquium in Relationship Marketing. ; 2009.
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Woisetschläger D, Garnefeld I, Eggert A. Can Successful Customer Acquisition Hurt the Existing Customer Base? In: Proceedings of the 2009 AMA Summer Marketing Educators’ Conference. ; 2009.
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Garnefeld I, Münkhoff E, Hogreve J, Eggert A. Referral reward programs: New customer acquisition by opportunism? In: Proceedings of the 15th Academy of Marketing Science (AMS) World Marketing Congress. ; 2009.
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Eggert A, Ulaga W. Musing on a Decade of Customer Value Research in Business Relationships: Where Do We Come From? Where Should We Go? In: Proceedings of the 4th International Conference on Business Market Management. ; 2009.
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Garnefeld I, Helm S, Tax S, Eggert A. Customer Referral Programs and Customer Retention – Do Rewards Undermine the Retention Effect? In: Proceedings of the 2009 AMA Winter Educators’ Proceedings. ; 2009.
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Garnefeld I, Münkhoff E, Hogreve J, Eggert A. Unintended effects of referral reward programs: Exploring the impact of rewards on opportunistic behavior. In: Proceedings of the 38th European Marketing Academy (EMAC) Conference. ; 2009.
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Eggert A, Henseler J, Hollmann S. Who Owns the Customer? Exploring Customer Loyalty in a Channel Context. In: Proceedings of the 38th European Marketing Academy (EMAC) Conference. ; 2009.
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Buchholz SS, Fischer SF, Kunze U, Reuter D, Wieck AD. Nonlocal Aharonov–Bohm conductance oscillations in an asymmetric quantum ring. Applied Physics Letters. 2009;94(2). doi:10.1063/1.3069281
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DOI: 10.1063/1.3069281

Gerth C, Küster J, Engels G. Language-Independent Change Management of Process Models. In: Proceedings of the ACM/IEEE 12th International Conference on Model Driven Engineering Languages and Systems (MODELS’09). Denver (CO, USA). Vol 5795. LNCS. Berlin/Heidelberg: Springer; 2009:152-166. doi:http://dx.doi.org/10.1007/978-3-642-04425-0_12
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DOI: http://dx.doi.org/10.1007/978-3-642-04425-0_12

Assmann M, Haack M, Scheider H, vom Hagen N, Zacharias R. SOA-Business Case. In: Transform IT: Optimale Geschäftsprozesse Durch Eine Transformierende IT. Wiesbaden, Deutschland: Gabler; 2009:97-126.
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Baumann A, Engels G, Hofmann A, Sauer S, Willkomm J. A Holistic Software Engineering Method for Service-Oriented Application Landscape Development. In: Proceedings of the First NAF Academy Working Conference on Practice-Driven Research on Enterprise Transformation (PRET 2009), Amsterdam (The Netherlands). Vol 28. Lecture Notes in Business Information Processing. Berlin/Heidelberg: Springer; 2009:1-17. doi:http://dx.doi.org/10.1007/978-3-642-01859-6
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DOI: http://dx.doi.org/10.1007/978-3-642-01859-6

Meixner G, Görlich D, Breiner K, et al. Model Driven Development of Advanced User Interfaces 2009. In: Proceedings of the 2009 International Conference on Intelligent User Interfaces. New York, NY, USA: ACM Press; 2009:503-504. doi:http://doi.acm.org/10.1145/1502650.1502737
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DOI: http://doi.acm.org/10.1145/1502650.1502737

Küster J, Gerth C, Engels G. Dependent and Conflicting Change Operations of Process Models. In: Proceedings of the 5th European Conference on Model-Driven Architecture Foundations and Applications (ECMDA-FA’09). Vol 5562. LNCS. Berlin/Heidelberg: Springer; 2009:158-173. doi:http://dx.doi.org/10.1007/978-3-642-02674-4_12
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DOI: http://dx.doi.org/10.1007/978-3-642-02674-4_12

Engels G, Geisen S, Sauer S, Port O. Sicherstellen der Betrachtung von nicht-funktionalen Anforderungen in SCRUM-Prozessen durch Etablierung von Feedback. In: Informatik 2009 - Im Focus Das Leben. Vol 154. Lecture Notes in Informatics. Bonn: Gesellschaft für Informatik (GI); 2009:458.
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Salger F, Sauer S, Engels G. Integrated Specification and Quality Assurance for Large Business Information Systems. In: Proceedings of the 2nd India Software Engineering Conference (ISEC’09). New York, NY, USA: ACM Press; 2009:129-130.
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Güldali B, Mlynarski M, Wübbeke A, Engels G. Model-Based System Testing Using Visual Contracts. In: Proceedings of Euromicro SEAA Conference 2009, Special Session on “Model Driven Engineering.” Washington, DC, USA: IEEE Computer Society; 2009:121-124.
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