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@article{MM2_1996__89_3_156147, author = {Heinrich Steinlein}, title = {On the {Index} of {Approximating} {Sets} of {Periodic} {Points.}}, journal = {Manuscripta mathematica}, pages = {15--34}, publisher = {mathdoc}, volume = {89}, number = {3}, year = {1996}, zbl = {0853.54039}, url = {http://geodesic.mathdoc.fr/item/MM2_1996__89_3_156147/} }
Heinrich Steinlein. On the Index of Approximating Sets of Periodic Points.. Manuscripta mathematica, Tome 89 (1996) no. 3, pp. 15-34. http://geodesic.mathdoc.fr/item/MM2_1996__89_3_156147/