Meireles, M., Soares, I. & Afonso, O. (2015). Clean and dirty technologies under environmental policy. In Madaleno, M., Robaina, M., Dias, M. F., Moutinho, V., and Sousa, J. (Ed.), ME3 2015: Proceedings of the 2nd International Meeting on Energy and Environmental Economics. (pp. 110-119). Aveiro: UA Editora.