%0 Journal Article %A Gliviak, Ferdinand %T On the impossibility to construct diametrically critical graphs by extensions %J Archivum mathematicum %D 1975 %P 131-137 %V 11 %N 3 %I mathdoc %U http://geodesic.mathdoc.fr/item/ARM_1975__11_3_a1/ %G en %F ARM_1975__11_3_a1