Finite direct sum of uniform modules (Q1065126)

\textit{M. Harada} has determined a class of right Artinian rings satisfying a condition on closure of finite direct sums of hollow modules and such that any hollow module is quasi-projective [ibid. 22, 81-98 (1985; Zbl 0559.16010)]. The above class generalizes the class of right serial rings. In the present paper the author gives a dual generalization of right coserial rings in terms of uniform modules and quasi-injectivity.