@Article{TAC-10_Song-Lanzon-Patra-Petersen,
 author       = "Song, Z. and Lanzon, A. and Patra, S. and Petersen, I. R.",
 title        = "Towards controller synthesis for systems with negative imaginary frequency response",
 journal      = "{IEEE} Transactions on Automatic Control",
 volume       = 55,
 number       = 6,
 pages        = "1506-1511",
 doi          = "10.1109/tac.2010.2045700",
 month        = jun,
 year         = 2010}