bounds on pressures) are known as well as the costs to buy and lay a pipeline or
build a compressor station. In order to minimize ..... There is no loss of generality
in assuming such a structure, ..... et la distribution du gaz, Livre IX, Edité par l'
Association Technique de l'industrie du gaz en France,. 1990, ISBN 2-86655-048
-X. 
