@article{paperid:1012910, author = {A. Hessami Naghshbandy and H. Shanechi and A. Kazemi and Pariz, Naser}, title = {An Investigation on the Performanceof Approximate Methods in theRepresentation of Stressed Power Systems}, journal = {Scientia Iranica}, year = {2009}, volume = {16}, number = {1}, month = {June}, issn = {1026-3098}, pages = {74--83}, numpages = {9}, keywords = {Power system dynamics; Normal forms method; Modal Series technique; Modal analysis; Nonlinear interaction.}, }