Assaf, A. / 2009 / Accounting for Size in Efficiency Comparison of airports / Journal of Air Transport Management 15 : 256 ~ 258 Assaf, A. / 2010 / Hotel Efficiency : A Bootstrapped Metafrontier Approach / International Journal of Hospitality Management 29 : 468 ~ 475 Banker, R. D. / 1984 / Some Models for the Estimation of Technical and Scale Efficiencies in Data Envelopment Analysis / Management Science 30 (9) : 1078 ~ 1092 Battese, G. E. / 2004 / A Metafrontier Production Function for Estimation of Technical Efficiencies and Technology Gaps for Firms Operating Under Different Technologies / Jo Battese, G.E / 2002 / Technology Gap, Efficiency, and a Stochastic Metafrontier Function / International Jouranl of Business and Economics 1 : 87 ~ 93