1. (1) P. Gomes, A. C. Siqueira de Lima, and A. de Pa´dua Guarini: “Guidelines for Power System Restoration in the Brazilian System”, PES winter meeting, 2002, IEEE, Vol. 2, p. 1299 (2002)
2. (2) IEEE Working Group: “Modeling and analysis of Guidelines for Slow Transients-Part III”, IEEE Trans. Power Delivery, Vol. 15, No. 1 (2000-1)
3. Nonlinear Oscillations in Three-Phase Circuits