Wang, Q. ., Y. . Ren, Y. . Wang, C. . Liu, and S. . Wu. “Residual Flux Measurement of Single-Phase Transformers Based on Equivalent Resistance”. Applied Computational Electromagnetics Society Journal (ACES), vol. 38, no. 07, July 2023, pp. 539-48, doi:10.13052/2023.ACES.J.380710.