@article{RO_1991__25_1_3_0,
     author = {Boffey, Brian and Karkazis, John},
     title = {Preface},
     journal = {RAIRO - Operations Research - Recherche Op\'erationnelle},
     pages = {3--3},
     publisher = {EDP-Sciences},
     volume = {25},
     number = {1},
     year = {1991},
     language = {en},
     url = {http://archive.numdam.org/item/RO_1991__25_1_3_0/}
}