A Simple and Efficient Method for Accurate Measurement and Control of Power Frequency Deviation
 D. Fan and V. Centeno, “Phasor-based synchronized frequency measurement in power systems,” IEEE Transaction on Power Delivery. vol. 22, pp. 2010-2016, Oct. 2007.
 J. Dwivedi, M. Shukla, K. S. Verma, R. K. Singh, “A novel technique for indication of power frequency deviations in electrical systems,” Power Electronics and Instrumentation Engineering. vol. 102, Springer Berlin Heidelberg, Sept. 2010, pp. 80-82.
 C. Zhao, U. Topcu, Na Li, and S. H. Low “Design and stability of load-side primary frequency control in power systems” IEEE Trans. on Automatic Control, vol. 59 No. 5, pp. 1177-1189, May 2014.
 M. Ahmad, “Measurement of power system frequency deviation using a microprocessor,” International journal of Electronics. vol. 68, pp. 161-164, Jan. 1990.
 A. Lopez, J. C. Montano, M. Castilla, J. Gutierrez, M. D. Borras, and J. C. Bravo, “power system frequency measurement under non-stationary situations,” IEEE Trans. on Power Delivery. vol. 23, pp. 562-567, April 2008.
 K. Alam, T. Chakraborty, S. Pramanik, D. Sarddar, S. Mal, “Measurement of power frequency with higher accuracy usingpic microcontroller,” Elsevier, ScienceDirectProcedia Technology, vol. 10, pp. 849 – 855,2013.
 S. R. Nam, S. H. Kang and S. Hee Kang, “Real-Time Estimation of Power System Frequency Using a Three-Level Discrete Fourier Transform Method” Energies 2015, vol. 8, pp. 79-93, Dec. 2014.
 M. Ahmad, “Power System Frequency Deviation Measurement Using an Electronic Bridge”, IEEE Trans. Inst. Meas. vol. 37, No. 1, pp. 147-148, 1988.
 W. Ahmad, “A Simple Pulse Duration or Frequency Deviation Meter,” IETE Technical review, vol. 4, No. 6, p. 249, 1987.
 T. Kasparis, N.C. Voulgari, and C.C. Halkias, “A Method for the Precise Measurement of the Difference between Two Low Frequencies,” IEEE Trans. Instrum. Meas., vol. IM-34, pp. 95-96, March 1985.