1. Every countable reduced torsion-free ring is an endomorphism ring;Corner,1963
2. On endomorphism rings of primary abelian groups;Corner;Quart. J. Math. Oxford,1969
3. Every countable reduced torsion-free algebra is an endomorphism algebra;Corner,1973
4. Prescribing endomorphism algebras, a unified treatment;Corner,1985
5. Every cotorsion-free algebra is an endomorphism algebra;Dugas;Math. Z.,1982