Evaluating Database Selection Techniques: A Testbed and Experiment. - James C. French; Allison L. Powell; Charles L. Viles; Travis Emmitt; Kevin J. Prey (SIGIR, 1998)

Comparing the Performance of Database Selection Algorithms. - James C. French; Allison L. Powell; James P. Callan; Charles L. Viles; Travis Emmitt; Kevin J. Prey; Yun Mou (SIGIR, 1999)