%0 Journal Article %A Gatial, Ján %A Kaprálik, Peter %T On median point of the system of elements of $A$-structure %J Mathematica slovaca %D 2001 %P 275-280 %V 51 %N 3 %I mathdoc %U http://geodesic.mathdoc.fr/item/MASLO_2001__51_3_a3/ %G en %F MASLO_2001__51_3_a3