Gauss's three squares theorem with almost prime variables

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Guangshi Lü Acta Arithmetica 128 (2007), 391-399 MSC: 11P32, 11P05, 11P55, 11N36. DOI: 10.4064/aa128-4-7

Guangshi LüDepartment of Mathematics
Shandong University
Jinan, Shandong, 250100, P.R. China
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