An analysis of heuristics for the parallel-machine flexible-resource scheduling problem. - Richard L. Daniels; Barbara J. Hoopes; Joseph B. Mazzola (Ann. Oper. Res., 1997)

Efficiency performance, control charts, and process improvement: complementary measurement and evaluation. - Barbara J. Hoopes; Konstantinos P. Triantis (IEEE Trans. Engineering Management, 2001)