%0 Journal Article %T Academician Otakar Borůvka (on the occasion of his ninetieth birthday) %J Archivum mathematicum %D 1990 %P 65-66 %V 26 %N 2-3 %I mathdoc %U http://geodesic.mathdoc.fr/item/ARM_1990__26_2-3_a0/ %G en %F ARM_1990__26_2-3_a0