“…We mention that most of the results of this paper extend some theorems that appear in the case of commutative rings ( [1], [3], [5], [6], [11], [12], [30], [35], [43], [48], [49]), bounded distributive lattices ( [4], [17], [18], [26], [30], [40], [43], [45]), MV-algebras ( [9], [14]), BL -algebras [32], residuated lattices ( [36], [41]),etc.…”