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Chen, Jianyu, Vadim Kaloshin, and Hong Kun Zhang. “Length Spectrum Rigidity for Piecewise Analytic Bunimovich Billiards.”https://doi.org/10.1007/s00220-023-04837-z__Communications in Mathematical Physics. Springer Nature, 2023.https://doi.org/10.1007/s00220-023-04837-z .

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