Author,Title,Journal,ISSN,Publisher,Date,Volume,Number,Page,URL,URL(DOI) Hagiwara Makoto and Pham Phuong Viet and Akagi Hirofumi,Elucidation of DC Magnetic Deviation in Converter Transformers Used for a Self-Commutated BTB System during Single-Line-to-Ground Faults,IEEJ Transactions on Industry Applications,09136339,The Institute of Electrical Engineers of Japan,2007,127,9,1013-1022,https://cir.nii.ac.jp/crid/1390282679634477568,https://doi.org/10.1541/ieejias.127.1013