@article{RO_2002__36_4_311_0,
     author = {Demange, Marc and Paschos, Vangelis},
     title = {Autour de nouvelles notions pour l'analyse des algorithmes d'approximation : de la structure de {NPO} \`a la structure des instances},
     journal = {RAIRO - Operations Research - Recherche Op\'erationnelle},
     pages = {311--350},
     publisher = {EDP-Sciences},
     volume = {36},
     number = {4},
     year = {2002},
     doi = {10.1051/ro:2003009},
     zbl = {1096.68783},
     language = {fr},
     url = {http://www.numdam.org/articles/10.1051/ro:2003009/}
}