@article{RO_1977__11_2_233_0,
     author = {Arana, Ramon M.},
     title = {Programming with parametric elements of the matrix coefficients},
     journal = {RAIRO - Operations Research - Recherche Op\'erationnelle},
     pages = {233--238},
     publisher = {EDP-Sciences},
     volume = {11},
     number = {2},
     year = {1977},
     mrnumber = {444052},
     zbl = {0356.90074},
     language = {en},
     url = {http://archive.numdam.org/item/RO_1977__11_2_233_0/}
}