@ARTICLE{Georgiou2014,
  author =	 {Georgiou, George M.},
  journal =	 {Neural Networks and Learning Systems, IEEE
                  Transactions on},
  title =	 {The Field of Values of a Matrix and Neural Networks},
  year =	 2014,
  month =	 {Sept},
  volume =	 25,
  number =	 9,
  pages =	 {1613-1620},
  doi =		 {10.1109/TNNLS.2013.2293287},
  ISSN =	 {2162-237X}
}