%0 Journal Article %A P. Mogin %A I. Luković %A M. Govedarica %T Extended referential integrity %J Novi Sad Journal of Mathematics %D 2000 %P 111-122 %V 30 %N 3 %I mathdoc %U http://geodesic.mathdoc.fr/item/NSJOM_2000_30_3a_11/ %F NSJOM_2000_30_3a_11