%0 Journal Article %A Gagola, Stephen III, %A Kepka, Tomáš %T Transitive closures of binary relations. IV. %J Acta Universitatis Carolinae. Mathematica et Physica %D 2012 %P 47-60 %V 53 %N 2 %I mathdoc %U https://geodesic-test.mathdoc.fr/item/AUCMP_2012__53_2_a5/ %G en %F AUCMP_2012__53_2_a5