1. Bolduc, L., Granger, M., Pare, G., Saintonge, J., Brophy, L. (2005): Development of a DC current-blocking device for transformer neutrals. In IEEE transactions on power delivery (Vol. 20, pp. 163–168).
2. Dong, X., Liu, Y., Kappenman, J. G. (2011): Comparative analysis of exciting current harmonics and reactive power consumption from GIC saturated transformers. In Proceedings of the IEEE power engineering society winter conference (pp. 318–322).
3. Masoum, M. A. S., Moses, P. S. (2008): Influence of geomagnetically induced currents on three-phase power transformers. In Proceedings of the Australasian universities power engineering conference AUPEC.
4. Masoum, M. A. S., Moses, P. S. (2010): Impact of balanced and unbalanced direct current bias on harmonic distortion generated by asymmetric three-phase three-leg transformers. Electr. Power Appl., 4(7), 507–515.
5. Mei, G., Sun, Y., Liu, Y. (2010): Simulation on DC current distribution in AC power grid under HVDC ground-return-mode. J. Electromagnet. Anal. Appl., 2(7), 418–423.