1. Environmental Working Group 2009 Greener school cleaning supplies = fresh air + healthier kids http://creativemedsolutions.com/uploads/EWGschoolcleaningsupplies.pdf
2. European Commission 2014 EDS database and categorization http://ec.europa.eu/environment/chemicals/endocrine/strategy/substances_en.htm
3. European Parliament 1967 Directive 67/548/EEC - classification, packaging and labeling of dangerous substances https://osha.europa.eu/en/legislation/directives/exposure-to-chemical-agents-and-chemical-safety/osh-related-aspects/58
4. European Parliament 1999 Directive 1999/45/EC - classification, packaging and labeling of dangerous preparations https://osha.europa.eu/en/legislation/directives/exposure-to-chemical-agents-and-chemical-safety/osh-related-aspects/59
5. Hazardous substances in frequently used professional cleaning products;Gerster;Int. J. Occup. Environ. Health,2014