@article{canellas2004material,
  title = {Material flow accounting of Spain}
  author = {Cañellas, Sílvia and González, Ana Citlalic and Puig, Ignasi and Russi, Daniela and Sendra, Cristina and Sojo, Amalia},
  journal = {International Journal of Global Environmental Issues},
  url = {https://www.researchgate.net/publication/5172198_Material_flow_accounting_of_Spain},
  doi = {10.1504/IJGENVI.2004.006052},
  year = {2004}
}