@article{GDZPPN002355639, title = {A strongly annular function with countably many singular values.}, journal = {Mathematica Scandinavica}, volume = {44}, year = {1979}, pages = {330-334}, zbl = {0428.30019}, url = {http://dml.mathdoc.fr/item/GDZPPN002355639} }
Carroll, F.W. A strongly annular function with countably many singular values.. Mathematica Scandinavica, Tome 44 (1979) pp. 330-334. http://gdmltest.u-ga.fr/item/GDZPPN002355639/