Security-Constrained Unit Commitment With Natural Gas Transmission Constraints Liu, Cong ; Shahidehpour, M. ; Fu, Yong ; Li, Zuyi Abstract Publication: IEEE Transactions on Power Systems Pub Date: August 2009 DOI: 10.1109/TPWRS.2009.2023262 Bibcode: 2009ITPSy..24.1523L