TY  - RPRT
TI  - Element speciation definitions, analytical methodology, and some examples.
AU  - Bernhard Michalke
PY  - 2003
DO  - 10.1016/s0147-6513(03)00056-3
UR  - https://pubmed.ncbi.nlm.nih.gov/12915146/
ID  - 12915146
ER  -