Analele Stiintifice ale Universitatii Al I Cuza din Iasi - Matematica, cilt.3, sa.F2, ss.871-881, 2016 (Scopus)
In this paper, S denotes a commutative multiplicative semigroup with 1 and 0. A nonempty subset I of S is called an ideal of S if I satisfies the condition SI ⊆ I. We introduce and investigate the concepts of 2-absorbing ideals and strongly 2-absorbing ideals of S. Also, we study the relationships between 2-absorbing ideals and strongly 2-absorbing ideals of S.