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@article{MS2_1989__65_2_167074, author = {Oryan. M.H.}, title = {On power series and {Mahler's} {U-numbers.}}, journal = {Mathematica Scandinavica}, pages = {143--151}, publisher = {mathdoc}, volume = {65}, number = {2}, year = {1989}, zbl = {0706.11034}, url = {http://geodesic.mathdoc.fr/item/MS2_1989__65_2_167074/} }
Oryan. M.H. On power series and Mahler's U-numbers.. Mathematica Scandinavica, Tome 65 (1989) no. 2, pp. 143-151. http://geodesic.mathdoc.fr/item/MS2_1989__65_2_167074/