Ahsan, Javed et al., Some homological characterizations of semigroups and semirings, Acta mathematica Sinica. English series (Print) , 27(10), 2011, pp. 2065-2072
In this paper we characterize semirings all of whose p-injective semimodules are injective. We also classify monoids all of whose p-injective acts are injective.