[1] Arens R., Singer I. M.: Generalized analytic functions. Trans. Amer. Math. Soc, 81 (1956), 379-393. DOI 10.1090/S0002-9947-1956-0078657-5 | MR 0078657 | Zbl 0078.10902

[2] Bergman J. G., Rothman J. J.: An $L^1$-algebra for algebraically irreducible semigroups. Studia Math., 33 (1969), 257-272. DOI 10.4064/sm-33-3-257-272 | MR 0248539

[3] Comfort W. W.: The Silov boundary induced by a certain Banach algebra. Trans. Amer. Math. Soc, 98 (1961), 501-517. MR 0120530 | Zbl 0097.10703

[4] Rothman N. J.: Linearly quasi-ordered compact semigroups. Proc. Amer. Math. Soc, 13 (1962), 352-357. DOI 10.1090/S0002-9939-1962-0138094-X | MR 0138094 | Zbl 0105.01703

[5] Rothman N. J.: An $L^1$-algebra for certain locally compact topological semigroups. Pacific J. Math., 23 (1967), 143-151. DOI 10.2140/pjm.1967.23.143 | MR 0215112

[6] Rothman N. J.: An $L^1$-algebra for linearly quasi-ordered compact semigroups. Pacific J. Math., 26 (1968), 579-588. DOI 10.2140/pjm.1968.26.579 | MR 0233914