@article{okail_2010, 
  title={Cobalt chloride, a chemical inducer of hypoxia-inducible factor-1α in U251 human glioblastoma cell line}, 
  volume={14}, 
  DOI={10.1016/j.jscs.2010.02.005}, 
  publisher={Elsevier BV}, 
  author={Okail}, 
  year={2010}
  }