Examining the Cost Efficiency of Chinese Hydroelectric Companies Using a Finite Mixture Model
Carlos Pestana Barros, Zhongfei Chen, Shunsuke Managi, Olinda Sequeira Antunes
Energy Economics, vol. 36, 2013, p. 511-517.

Performance Assessment of Portuguese Wind Farms: Ownership and Managerial Efficiency
Carlos Pestana Barros, Olinda Sequeira Antunes
Energy Policy, vol. 39, 2011, p. 3055-3063.