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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...
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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.
ROMMES, J., MARTINS, N., Exploiting structure in large-scale electrical circuit and power system problems, Linear Algebra and its Applications, Vol. 431, Issue 3-4, 2009, pp. 318-333. Download from ScienceDirect.