5FLANIGAN O.Constrained derivatives in natural gas pipeline system optimization.Journal of Petroleum Technology,1972(5):549-556.
6EDGAR T F,HIMMELBLAU D M,BICKEL T C.Optimal design of gas transmission networks.Society of Petroleum Engineering Journal,1978(4):96-104.
7BHASKARAN S,SALZBORN F J M.Optimal diameter assignment for gas pipeline networks.Journal of Australia Mathematics Society,1979,21:129-144.
8MURTAGH B A,SOLIMAN F I.Subgradient optimization applied to a discrete nonlinear problem in engineering design.Mathematical Programming,1983(25):1-12.
9Flanigan O: Constrained Derivatives in Natural Gas Pipeline System Optimization, Journal of Petroleum Technology,1972(5).
10Edgar T F, Himmelblau D M, Bickel T C: Optimal Design of Gas Transmission Networks,Society of Petroleum Engineering Journal, SPE 6034,1978(4).
