Hyun O. B., Yim S. W., Yu S. D., Yang S. E., Kim W. S., Kim H. R., Lee G. H., Sim
                           J. W., Park K. B., 2011, Long- Term Operation and Fault Tests of a 22.9kV Hybrid SFCL
                           in the KEPCO Test Grid, IEEE Transactions on Applied Superconductivity, Vol. 21, No.
                           3
