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@article{MZ_1965__89_170445, author = {Norman L. Alling}, title = {Extensions of meromorphic function rings over non-compact {Riemann} surfaces. {I.}}, journal = {Mathematische Zeitschrift}, pages = {273--299}, publisher = {mathdoc}, volume = {89}, year = {1965}, language = {en}, url = {http://geodesic.mathdoc.fr/item/MZ_1965__89_170445/} }
Norman L. Alling. Extensions of meromorphic function rings over non-compact Riemann surfaces. I.. Mathematische Zeitschrift, Tome 89 (1965), pp. 273-299. http://geodesic.mathdoc.fr/item/MZ_1965__89_170445/