I am looking for a detailed account, in English or French, of the main result and its proof from this paper by O. Forster

Zur Theorie der Steinschen Algebren und Moduln, Mathematische Zeitschrift 97, 376-405, 1967.

The main result of this article is an equivalence of categories between certain Stein spaces and their Frechet algebras of global functions. Does anyone know where I can find this result (or a generalization of it) proven in English or French?