1. EuP Lot 11 Motors, Final report to the European Commissionhttps://circabc.europa.eu/sd/d/62415be2-3d5a-4b3f-b29a-d1760f4dc11a/Lot11%20Motors%201-8%20final%2028-04-08.pdf
2. Study on Improving the Energy Efficiency of Pumpshttp://www.jakob-albertsen.dk/komposit/Darmstadtrapport.pdf
3. A comprehensive review on energy efficiency enhancement initiatives in centrifugal pumping system
4. European Commission Regulation (EC) No. 640/2009 Implementing Directive 2005/32/ EC of the European Parliament and of the Council with Regard to Ecodesign Requirements for Electric Motors, (2009), Amended by Commission Regulation (EU) No 4/2014 of January 6, 2014, Document 32014R0004https://eur-lex.europa.eu/legal-content/EN/TXT/?uri=CELEX%3A32014R0004