%0 Journal Article %A Rudolf Ahlswede %A Levon Khachatrian %T On extremal sets without coprimes %J Acta Arithmetica %D 1994 %P 89-99 %V 66 %N 1 %I mathdoc %U http://geodesic.mathdoc.fr/articles/10.4064/aa-66-1-89-99/ %R 10.4064/aa-66-1-89-99 %G en %F 10_4064_aa_66_1_89_99