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Sueyoshi T (1999). ?DEA Duality on Returns to Scale (Rts) in Production and Cost Analyses: An Occurrence of Multiple Solutions and Differences between Production-Based and Cost-Based Rts Estimates.” Management Science 45(11): 1593-1608.

Sueyoshi T (1999). ?DEA Non-Parametric Ranking Test and Index Measurement: Slack-Adjusted DEA and an Application to Japanese Agriculture Cooperatives.” Omega 27(3): 315-326.

Sueyoshi T (1999). ?DEA-Discriminant Analysis in the View of Goal Programming.” EJOR 115(3): 564-582.

Sueyoshi T (1999). “Tariff Structure of Japanese Electric Power Companies: An Empirical Analysis Using DEA.” EJOR 118(2): 350-374.

Sueyoshi T (2000). “Stochastic DEA for Restructure Strategy: An Application to a Japanese Petroleum Company.” Omega 28(4): 385-398.