@misc{indiciaee495120a320a,
  title = {Some comments on extraction analysis of cations complexed with a crown ether.},
  author = {I M Kolthoff},
  year = {1983},
  doi = {10.1007/bf01961479},
  url = {https://pubmed.ncbi.nlm.nih.gov/6225991/},
  note = {Source identifier: 6225991}
}