ECHA 2008: Guidance on information requirements and chemical safety assessment, Chapter R.11: PBT Assessment, European Chemicals Agency. (http://echa.europa.eu/documents/10162/13643/information_requirements_part_c_en.pdf, 2012-03-25)
ECHA 2008: Guidance on information requirements and chemical safety assessment, Chapter R.11: PBT Assessment, European Chemicals Agency. (http://echa.europa.eu/documents/10162/13643/information_requirements_part_c_en.pdf, 2012-03-25)