@article{article1155,
  title = {Removal of Cu (II), Ni (II), Cd (II) AND Cr (VI) ions from aqueous Solutions by biosorption processes},
  author = {ASLAN, S. and BOZKURT, Z. and N. TEKELİ, A.},
  journal = {Sigma Journal of Engineering and Natural Sciences},
  year = {2007},
  volume = {25},
  pages = {209-222},
  doi = {}
}