@article{ricardo2012the,
  title = {The Ecological Footprint: Application in the Province of Tucumán}
  author = {Ricardo René Ferrari; Ana Isabel Dantur; Lucía Zarbá},
  journal = {Ciencia (Science)},
  url = {http://www.exactas.unca.edu.ar/revista/v260/pdf/ciencia26-10.pdf},
  year = {2012}
}