TY  - RPRT
TI  - Trends in certified reference materials for the speciation of trace elements.
AU  - R Cornelis
AU  - H Crews
AU  - O F Donard
AU  - L Ebdon
AU  - P Quevauviller
PY  - 2001
DO  - 10.1007/s002160100709
UR  - https://pubmed.ncbi.nlm.nih.gov/11451221/
ID  - 11451221
ER  -