B. J. Gruell

Five years experience with a new method of field testing cross and quadrature polarized mho distance relays. II. Three case studies

W. O. Kennedy, B. J. Gruell, C. H. Shih, 1988 .

Five years experience with a new method of field testing cross and quadrature polarized mho distance relays. I. Results and observations

W. O. Kennedy, B. J. Gruell, C. H. Shih, 1988 .