Explanatory Variables Driving the Technical Efficiency of European Seaports: An Order-Alpha Approach Dealing with Imperfect Knowledge
Diogo Ferreira, Rui Cunha Marques, Maria Isabel Pedro
Transportation Research: Part E: Logistics And Transportation Review, vol. 119, 2018, p. 41-62.

Cost Efficiency of Portuguese Hotels in the Algarve: A Comparative Analysis Using Mathematical and Econometric Approaches
Ricardo Oliveira, Maria Isabel Pedro, Rui Cunha Marques
Tourism Economics, vol. 20, 2014, p. 797-812.