FREITAS, F.D., ROMMES, J., MARTINS, N. Gramian-Based Reduction Method Applied to Large Sparse Power System Descriptor Models. IEEE Transactions on Power Systems , USA, Vol. 23, No. 3, p. 1258-1270, August 2008. Download from IEEE Xplore.
ROMMES, J., MARTINS, N., Computing transfer function dominant poles of large second-order dynamical systems, SIAM Journal on Scientific Computing, Vol. 30, Issue 4, 2008, pp. 2137- 2157. Download from Scitation.
ROMMES, J., MARTINS, N. Computing Large-Scale System Eigenvalues Most Sensitive to Parameter Changes, with Applications to Power System Small-Signal Stability. IEEE Transactions on Power Systems , USA, Vol. 23, No. 2, p. 434-442, May 2008. Download...
MARTINS, N., PELLANDA, P.C., ROMMES, J. Computation of Transfer Function Dominant Zeros with Applications to Oscillation Damping Control of Large Power Systems. IEEE Transactions on Power Systems , USA, Vol. 22, No. 4, p. 1657-1664, November 2007...
ROMMES, J. and MARTINS, N., Efficient Computation of Multivariable Transfer Function Dominant Poles Using Subspace Acceleration. IEEE Transactions on Power Systems , USA, Vol. 21, No. 4, p. 1471-1483, November 2006. Download from IEEE Xplore.