Rings characterized by the extending property for finitely generated submodules - Banh Duc Dung (Miskolc Mathematical Notes)
A module MMMM=H⊕KHHKN1,N2MN1∩N2=0M1,M2MNiMii=1,2M1⊕M2MRRR⊕RRRRR(ℕ ⁡ )