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Balasubramanian, K., Davidson, E.R. Rational approximations to pie: transcendental π and Euler’s Constant e. J Math Chem 61, 1471–1476 (2023). https://doi.org/10.1007/s10910-023-01480-w
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DOI: https://doi.org/10.1007/s10910-023-01480-w