%0 Journal Article %A Serban E. Vlad %T The intersection and the union of the asynchronous systems %J Buletinul Academiei de Ştiinţe a Republicii Moldova. Matematica %D 2007 %P 3-22 %N 3 %I mathdoc %U http://geodesic.mathdoc.fr/item/BASM_2007_3_a0/ %G en %F BASM_2007_3_a0