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2. Motors Study Group. Actions to promote energy-efficient electric motors. Brussels, European Commission, DGXVII, 1996.
3. Energy efficiency improvements in electric motors and drives;De Almeida,1997
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5. EURODEEM—European database of energy-efficient motors, Joint Research Centre, European Commission. See also: http://iamest.jrc.it/projects/eem/eurodeem.htm.