@misc{indiciaecc8db18c4365,
  title = {A selective microscale x-ray fluorescence analyzing method for determination of trace elements.},
  author = {P Puumalainen and P Suominen and J Hattula and H Kalm},
  year = {1973},
  doi = {10.1016/0020-708x(73)90087-2},
  url = {https://pubmed.ncbi.nlm.nih.gov/4756229/},
  note = {Source identifier: 4756229}
}