@article{CC_2010_39_3_a13,
     author = {Giuli, Maria Elena De and Giorgi, Giorgio},
     title = {A remark on sensitivity in linear programming and {Gale-Samuelson} nonsubstitution theorem},
     journal = {Control and Cybernetics},
     pages = {827--838},
     year = {2010},
     volume = {39},
     number = {3},
     language = {en},
     url = {http://geodesic.mathdoc.fr/item/CC_2010_39_3_a13/}
}