1. Ahonen, T. (2011). Monitoring of centrifugal pump operation by a frequency converter. PhD Thesis. Lappeenranta University of Technology, Finland.
2. Ahonen, T., et al. (2010). Estimation of pump operational state with model-based methods. Energy Conversion and Management, 51(6), 1319–1325.
3. Ahonen, T., Ahola, J., Viholainen, J., & Tolvanen, J. (2011). Energy-efficiency-based recommendable operating region of a VSD centrifugal pump. In: International Conference on Energy Efficiency in Motor Driven Systems (EEMODS). Alexandria, Virginia, US.
4. Ahonen, T., Tamminen, J., Ahola, J., & Kestilä, J. (2012). Frequency-converter-based hybrid estimation method for the centrifugal pump operational state. IEEE Transactions on Industrial Electronics, 59(12), 4803–4809.
5. ANSI/HI (1997). 9.6.3: Centrifugal and vertical pumps for allowable operating region.