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@article{IM_1992__110_2_144038, author = {C. Gordon and D. Webb and S. Wolpert}, title = {Isospectral plane domains and surfaces via {Riemannian} orbifolds.}, journal = {Inventiones mathematicae}, pages = {1--22}, publisher = {mathdoc}, volume = {110}, number = {2}, year = {1992}, zbl = {0778.58068}, url = {http://geodesic.mathdoc.fr/item/IM_1992__110_2_144038/} }
C. Gordon; D. Webb; S. Wolpert. Isospectral plane domains and surfaces via Riemannian orbifolds.. Inventiones mathematicae, Tome 110 (1992) no. 2, pp. 1-22. http://geodesic.mathdoc.fr/item/IM_1992__110_2_144038/