VARRICCHIO, S.L., FREITAS, F.D., MARTINS, N., Hybrid modal-balanced truncation method based on power system transfer function energy concepts, IET Gener. Transm. Distrib., 2015, Vol. 9, Iss. 11, pp. 1186–1194. Download from IET Digital Library.
VARRICCHIO, S.L., FREITAS, F.D., MARTINS, N., VELIZ, F.C., Computation of Dominant Poles and Residue Matrices for Multivariable Transfer Functions of Infinite Power System Models, IEEE Transactions on Power Systems, USA, Vol. 30, Issue:3, p. 1131...
F. D. FREITAS, N. MARTINS, S. L. VARRICCHIO, J. ROMMES, F. C. VELIZ, Reduced-Order Transfer Matrices from RLC Network Descriptor Models of Electric Power Grids. IEEE Transactions on Power Systems, USA, Vol. 26, Issue 4, November 2011, pp. 1905-1916...
ROMMES, J., MARTINS, N., FREITAS, F. , Computing Rightmost Eigenvalues for Small-Signal Stability Assessment of Large-Scale Power Systems. IEEE Transactions on Power Systems, USA, Vol. 25, Issue 2, May 2010, pp. 929-938. Download from IEEE Xplore.
GOMES JR, Sérgio; MARTINS, Nelson; PORTELA, Carlos. Sequential Computation of Transfer Function Dominant Poles of s-Domain System Models. IEEE Transactions on Power Systems, USA, Vol. 24, No. 2, p. 776-784, May 2009. Download from IEEE Xplore.