Author,Title,Journal,ISSN,Publisher,Date,Volume,Number,Page,URL,URL(DOI) Takashi Hikihara and Yoshihiko Susuki,An analysis with differential-algebraic equation in electric power system with DC transmission,IEEE/PES Transmission and Distribution Conference and Exhibition,,IEEE,2003-06-26,3,,1933-1936,https://cir.nii.ac.jp/crid/1874242817600217856,https://doi.org/10.1109/tdc.2002.1177754