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@article{MAN_1991__289_4_164784, author = {Peter Pflug and Marek Jarnicki}, title = {The inner {Carath\'edory} distance for the annulus.}, journal = {Mathematische Annalen}, pages = {335--340}, publisher = {mathdoc}, volume = {289}, number = {4}, year = {1991}, zbl = {0719.30036}, url = {http://geodesic.mathdoc.fr/item/MAN_1991__289_4_164784/} }
Peter Pflug; Marek Jarnicki. The inner Carathédory distance for the annulus.. Mathematische Annalen, Tome 289 (1991) no. 4, pp. 335-340. http://geodesic.mathdoc.fr/item/MAN_1991__289_4_164784/