1.		Cost efficiency of Portuguese hotels in the Algarve: a comparative analysis using mathematical and econometric approaches / Ricardo Oliveira, Maria Isabel Pedro and Rui Cunha Marques Autor: Oliveira, Ricardo Coautor: ; Pedro, Maria Isabel Marques, Rui Cunha COTA(S): RE-1822
2.		Efficiency and its determinants in Portuguese hotels in the Algarve / Ricardo Oliveira, Maria Isabel Pedro, Rui Cunha Marques Autor: Oliveira, Ricardo Coautor: ; Pedro, Maria Isabel Marques, Rui Cunha COTA(S): RE-1193