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Carlos B. De Lyra. Bol. Soc. Bras. Mat 5, 115–122 (1974). https://doi.org/10.1007/BF02938484
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DOI: https://doi.org/10.1007/BF02938484
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Carlos B. De Lyra. Bol. Soc. Bras. Mat 5, 115–122 (1974). https://doi.org/10.1007/BF02938484
Issue Date:
DOI: https://doi.org/10.1007/BF02938484
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