A Data Structure for Planning Based Workload Management of Heterogeneous HPC Systems
A. Keller, in: D. Klusádek, W. Cirne, N. Desai (Eds.), Proc. Workshop on Job Scheduling Strategies for Parallel Processing (JSSPP), Springer, 2018, pp. 132–151.

Cost-aware and SLO Fulfilling Software as a Service
O. Niehörster, J. Simon, A. Brinkmann, A. Keller, J. Krüger, Journal of Grid Computing 10 (2012) 553–577.

Rule Based Mapping of Virtual Machines in Clouds
C. Kleineweber, A. Keller, O. Niehörster, A. Brinkmann, in: Proc. Int. Conf. on Parallel, Distributed and Network-Based Computing (PDP), 2011.

Virtualized HPC: a contradiction in terms?
G. Birkenheuer, A. Brinkmann, J. Kaiser, A. Keller, M. Keller, C. Kleineweber, C. Konersmann, O. Niehörster, T. Schäfer, J. Simon, M. Wilhelm, Software: Practice and Experience (2011).

An Energy-Aware SaaS Stack
O. Niehörster, A. Keller, A. Brinkmann, in: Proc. Int. Meeting of the IEEE Int. Symp. on Modeling, Analysis and Simulation of Computer and Telecommunication Systems (MASCOTS), 2011.

Quality Assurance of Grid Service Provisioning by Risk Aware Managing of Resource Failures
D. Battré, M. Hovestadt, O. Kao, A. Keller, K. Voss, in: Proc. Int. Conf. on Risks and Security of Internet and Systems, 2008.

Virtual Execution Environments and the Negotiation of Service Level Agreements in Grid Systems
D. Battré, M. Hovestadt, O. Kao, A. Keller, K. Voss, in: Proc. Int. DMTF Academic Alliance Workshop on Systems and Virtualization Management: Standards and New Technologies, 2008.

Implementation of Virtual Execution Environments for improving SLA-compliant Job Migration in Grids
D. Battré, M. Hovestadt, O. Kao, A. Keller, K. Voss, in: Proc. Int. Workshop on Scheduling and Resource Management for Parallel and Distributed Systems, Portland, Oregon USA, 2008.

Germany, Belgium, France, and Back Again: Job Migration using Globus
D. Battré, M. Hovestadt, O. Kao, A. Keller, K. Voss, in: Proc. Int. Conf. on Grid Computing and Applications (GCA), 2008.

Virtual Execution Environments for ensuring SLA-compliant Job Migration in Grids
D. Battré, M. Hovestadt, O. Kao, A. Keller, K. Voss, in: Proc. Int. Conf. on Services Computing (SCC), 2008.

Job Migration and Fault Tolerance in SLA-aware Resource Management Systems
D. Battré, M. Hovestadt, O. Kao, A. Keller, K. Voss, in: Proc. Int. Conf. on Grid and Pervasive Computing (GPC), 2008, pp. 43–48.

Enhancing SLA Provisioning by Utilizing Profit-Oriented Fault Tolerance
D. Battré, M. Hovestadt, O. Kao, A. Keller, K. Voss, in: T.F. Gonzalez (Ed.), Proc. Int. Conf. on Parallel and Distributed Computing and Systems (PDCS), Orlando, FL, USA, 2008, pp. 212–218.

Increasing Fault-tolerance by Introducing Virtual Execution Environments.
D. Battré, M. Hovestadt, O. Kao, A. Keller, K. Voss, Increasing Fault-Tolerance by Introducing Virtual Execution Environments., Paderborn, Germany, 2008.

Paderborn, Belgien, Frankreich und zurück
M. Hovestadt, A. Keller, K. Voss, Paderborner Universitätszeitschrift (puz) SS 2 (2008).

Planning-based Scheduling for SLA-awareness and Grid Integration
D. Battré, M. Hovestadt, O. Kao, A. Keller, K. Voss, in: Proc. Workshop of the UK PLANNING AND SCHEDULING Special Interest Group (PlanSIG), 2007.

Transparent Cross Border Migration of Parallel Multi Node Applications
D. Battré, M. Hovestadt, O. Kao, A. Keller, K. Voss, in: Proc. Cracow Grid Workshop, Academic Computer Center CYFRNET, 2007, pp. 334–341.

Provision of Fault Tolerance with Grid-enabled and SLA-aware Resource Management Systems
F. Heine, M. Hovestadt, O. Kao, A. Keller, in: G.R. Jouberta, W.E. Nagel, F.J. Peters, O. Plata, F. Tirado, E.L. Zapata (Eds.), Parallel Computing: Current and Future Issues of High End Computing, 2006, pp. 113–120.

The Virtual Resource Manager: Local Autonomy versus QoS Guarantees for Grid Applications
L.-O. Burchard, F. Heine, H.-U. Heiss, M. Hovestadt, O. Kao, A. Keller, B. Linnert, J. Schneider, in: V. Getov, D. Laforenza, A. Reinefeld (Eds.), Future Generation Grids, 2006, pp. 83–98.

SLA-aware Job Migration in Grid Environments
F. Heine, M. Hovestadt, O. Kao, A. Keller, in: L. Grandinetti (Ed.), Grid Computing: New Frontiers of High Performance Computing, 2005, pp. 185–201.

A Quality-of-Service Architecture for Future Grid Computing Applications.
L.-O. Burchard, F. Heine, M. Hovestadt, O. Kao, A. Keller, B. Linnert, in: Proc. IEEE Int. Parallel &; Distributed Processing Symposium (IPDPS), 2005, pp. 132a-132a.