%0 Journal Article %A Fampa, Marcia %A Maculan, Nelson %T A new relaxation in conic form for the euclidean Steiner problem in $\Re ^n$ %J RAIRO - Operations Research - Recherche Opérationnelle %D 2001 %P 383-394 %V 35 %N 4 %I EDP-Sciences %U http://archive.numdam.org/item/RO_2001__35_4_383_0/ %G en %F RO_2001__35_4_383_0