@article{publication3725,
  title={Extended producer responsibility: a differential fee model for promoting sustainable packaging},
  author={Pires, Ana and  Martinho, Graça and  Ribeiro, Rita and  Mota, Mafalda and  Teixeira, Luís and  },
  journal={Journal of Cleaner Production},
  volume={108},
  pages={343-353},
  year={2015}
}