Swarm Intelligence in the Fine-Tuning of Software Development Cost Estimation Models. - Tad Gonsalves; Kei Yamagishi; Kiyoshi Itoh (COMPSAC (1), 2009)

Service Cost and Utilization rate Optimization in Service Systems. - Kei Yamagishi; Tad Gonsalves; Kiyoshi Itoh (Trans. SDPS, 2009)

Multi-objective optimization in service systems. - Tad Gonsalves; Kei Yamagishi; Kiyoshi Itoh (J. Digit. Inf. Manag., 2010)