@article{paperid:1057791, author = {Pariz, Naser and Modir Shanehchi, Mohammad Hassan and Ebrahim Vaahedi}, title = {Explaining and validating stressed power systems behavior using modal series}, journal = {IEEE Transactions on Power Systems}, year = {2003}, volume = {18}, number = {2}, month = {May}, issn = {0885-8950}, pages = {778--785}, numpages = {7}, keywords = {Modal interaction; modal series; normal forms of vector fields; stressed power system; system security}, }