"A comparison of approaches to large-scale data analysis", Andrew Pavlo, Erik Paulson, Alexander Rasin, Daniel J. Abadi, David J. Dewitt, Samuel Madden, and Michael Stonebraker, In SIGMOD '09: Proceedings of the 2009 ACM SIGMOD International Conference. ACM, June 2009. pdf
"HadoopDB: An Architectural Hybrid of MapReduce and DBMS Technologies for Analytical Workloads", Azza Abouzeid, Kamil Bajda-Pawlikowski, Daniel Abadi, Alexander Rasin, and Avi Silberschatz, In VLDB'09: Proceedings of the 2009 VLDB Endowment, August 2009. pdf