@article{ciacci2017the,
  title = {The European PVC cycle: In-use stock and flows}
  author = {Ciacci, L.; Passarini, F.; Vassura, I.},
  journal = {Resources, Conservation and Recycling},
  url = {http://www.sciencedirect.com/science/article/pii/S0921344916302002},
  doi = {10.1016/j.resconrec.2016.08.008},
  year = {2017}
}