1. International Harmonized Protocol for Proficiency Testing of (Chemical) Analytical Laboratories
2. IAEA analytical quality assurance programmes to meet the present and future needs of developing countries
3. F.P Carvalho, S.W. Fowler, J.P. Villeneuve, M. Horvat, Environmental Behaviour of Crop Protection Chemicals. International Atomic Energy Agency, Vienna, 1997, p. 35.
4. Global Programme of Action for the Protection of the Marine Environment from Land-based Activities. Resolution adopted by the Intergovernmental Conference, Washington, DC, 23 Oct.–3 Nov. 1995. Report UNEP(OCA) LBA/IG, 2/7, UNEP, Nairobi.