1. NMIs and other designated institutes, CIPM/2005-07 (http://www.bipm.org/en/cipm-mra/documents/).
2. Improving worldwide traceability and acceptance of measurements carried out within the CIPM MRA and the ILAC arrangement (http://www.bipm.org/en/cipm-mra/cipm-ilac_joint_statement.html).
3. Calibration and measurement capabilities in the context of the CIPM MRA, CIPM MRA-D-04, Version 1, 2008 (http://www.bipm.org/en/cipm-mra/documents/).
4. L. Mackay - Final report CCQM-P20a (Organic purity assessment series: P20a tributyltin chloride), 2002, OAWG archive document OAWG/-13.
5. S. Westwood - Final study report CCQM-P20.c.1 & P20.c.2 (Purity of atrazine), 2005, OAWG archive document OAWG/-18.