4Girgi s, A diy A. Application of Kaima II Filtering in Computer Relaying[J]. IEEE TrsnsaCti OIlS On Po er A pparatUs and Sy stem, PA S=100, NO.7: 3387-3395.
5A.A. Girgis and R.G Brown.Application of Kalman Filtering in Computr Relaying[J]. IEEE Transaction PowerApparatus and Systems, 1981, Vol pas-100 No.7.