Author,Title,Journal,ISSN,Publisher,Date,Volume,Number,Page,URL,URL(DOI) Watanabe Masayuki and Mitani Yasunori and Tsuji Kiichiro,Evaluation of Power System Stable Region Based on Hopf Bifurcation Theory,IEEJ Transactions on Power and Energy,03854213,The Institute of Electrical Engineers of Japan,2002,122,2,174-180,https://cir.nii.ac.jp/crid/1390282679580918912,https://doi.org/10.1541/ieejpes1990.122.2_174