1. IEC Publication 34–2A: ‘Methods for determining losses and efficiency of rotating electric machinery from tests (excluding machines for traction vehicles), measurement of losses by the calorimetric method’. 1974. First supplement to publication 34–2 (1972) ‘Rotating Electrical Machines. Part 2’
2. Roberts, D.: ‘The application of an induction motor thermal model to motor protection and other functions’, 1986, PhD Thesis, University of Liverpool