Planning the Future Exploitation of Ornamental Stones in Portugal Using a Weighed Multi-dimensional Approach
Jorge Carvalho, Catarina Lopes, António Mateus, Luís Martins, M. Goulão
Resources Policy, vol. 59, 2018, p. 298-317.

Biogas in Portugal: Status and Public Policies in a European Context
Isabel Malico, Miguel Ferreira Madureira , Isabel Paula Marqués
Energy Policy, vol. 43, 2012, p. 267-274.