@misc{indiciae1276d57d0050,
  title = {Visualization of anionic sites using polyethyleneimine-metal complexes.},
  author = {U Pfüller and K Ichev and W Ovtscharoff and H Franz},
  year = {1989},
  doi = {10.1016/s0065-1281(89)80069-8},
  url = {https://pubmed.ncbi.nlm.nih.gov/2500830/},
  note = {Source identifier: 2500830}
}