1. The theory of analytic functions in normed Abelian vector rings;Lorch, Edgar R.;Trans. Amer. Math. Soc.,1943
2. The structure of normed Abelian rings;Lorch, Edgar R.;Bull. Amer. Math. Soc.,1944
3. Normierte Ringe;Gelfand, I.;Rec. Math. [Mat. Sbornik] N. S.,1941
4. American Mathematical Society Colloquium Publications, Vol. 31;Hille, Einar,1948
5. Spectral theory;Dunford, Nelson;Bull. Amer. Math. Soc.,1943