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中国科学院数学与系统科学研究院期刊网
ISSN 1439-8516 CN 11-2039/O1
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Characterization of Arithmetic Functions that Preserve the Sum-of-squares Operation
Bojan BAŠIĆ
Acta Mathematica Sinica . 2014, (
4
): 689 -695 . DOI: 10.1007/s10114-014-3112-9