@inproceedings{sgem2007paper,
  title = {PRELIMINARY RESULTS OF METAL EXTRACTION FROM SPENT SULFURIC ACID CATALYST BY ACID LEACHING},
  author = {M. Guardiani and A.T. Ozturk and A. Ognyanova and I. De Michelis and F. Ferella and F. Veglio},
  booktitle = {7th International Scientific Conference - SGEM2007},
  year = {2007},
  pages = {},
  publisher = {SGEM Scientific GeoConference},
  doi = {}
}