@article{JWSP:20e,
  author =	 {J. W. Simpson-Porco},
  title =	 {On Area Control Errors, Area Injection Errors, and Textbook Automatic Generation Control},
  journal = {{IEEE} Transactions on Power Systems},
  year =	 2021,
  volume = {36},
  number = {1},
  month = jan,
  pages = {557-560},
  pdf =	 {http://www.control.utoronto.ca/~jwsimpson/papers/2020e.pdf},
  keywords =	 {Power Systems},
  doi = {10.1109/TPWRS.2020.3029418},
}