@article{10_4064_aa_66_1_89_99,
     author = {Rudolf Ahlswede and Levon Khachatrian},
     title = {On extremal sets without coprimes},
     journal = {Acta Arithmetica},
     pages = {89--99},
     publisher = {mathdoc},
     volume = {66},
     number = {1},
     year = {1994},
     doi = {10.4064/aa-66-1-89-99},
     language = {en},
     url = {http://geodesic.mathdoc.fr/articles/10.4064/aa-66-1-89-99/}
}