%0 Journal Article %A Lerman, Israël-César %T Comparing classification tree structures : a special case of comparing $q$-ary relations %J RAIRO - Operations Research - Recherche Opérationnelle %D 1999 %P 339-365 %V 33 %N 3 %I EDP-Sciences %U http://archive.numdam.org/item/RO_1999__33_3_339_0/ %G en %F RO_1999__33_3_339_0