@article{JRC20349, address = {}, year = {2000}, author = {Pauwels J}, abstract = {Abstract not available }, title = {Requirements for CRMs of the 21st Century.}, type = {}, url = {}, volume = {}, number = {}, journal = {Special Issue of Fresenius' Journal of Analytical Chemistry}, pages = {}, issn = {}, publisher = {}, doi = {} }