1Centre for Management Studies (CEG-IST), Technical University of Lisbon,
Avenida Rovisco Pais, 1049-001 Lisbon, Portugal
2Centre of Urban and Regional Systems (CESUR), Technical University of Lisbon,
Avenida Rovisco Pais, 1049-001 Lisbon, Portugal
3Water and Waste Services Regulation Authority (ERSAR), Rua Tomás da Fonseca,
Torre G, 8º 1600-209 Lisbon, Portugal
Pol. J. Environ. Stud. 2011;20(1):125–132