2-absorbing and strongly 2-absorbing secondary submodules of modules
  In this paper, we will introduce the concept of 2-absorbing (resp. strongly 2-absorbing) secondary submodules of modules over a commutative ring as a generalization of secondary modules and investigate some basic properties of these classes of modules. 
H. Ansari-Toroghy and F. Farshadifar
math.AC