.International Symposium on Mathematical programming(11th : 1982 : Univ. Bonn):Symposium volume, with abstracts of the papers, Bonn, Institut fur Okonometrie und Operations Research.Friedrich-Wilhelms-Univ.,n. d..
International Symposium on Mathematical programming(11th : 1982 : Univ. Bonn):Symposium volume, with abstracts of the papers, Bonn, Institut fur Okonometrie und Operations Research