@article{article1069,
  title = {Investigation of soil contaminated by lead, cadmium, mercury and nickel},
  author = {VELİ, S. and AYBERK, S. and ÇELİKER, B.S. and ALYÜZ, B.},
  journal = {Sigma Journal of Engineering and Natural Sciences},
  year = {2005},
  volume = {23},
  pages = {141-146},
  doi = {}
}