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@article{10_4064_aa110_3_6, author = {Yingchun Cai and Minggao Lu}, title = {On the upper bound for $\pi _{2}(x)$}, journal = {Acta Arithmetica}, pages = {275--298}, publisher = {mathdoc}, volume = {110}, number = {3}, year = {2003}, doi = {10.4064/aa110-3-6}, language = {en}, url = {http://geodesic.mathdoc.fr/articles/10.4064/aa110-3-6/} }
Yingchun Cai; Minggao Lu. On the upper bound for $\pi _{2}(x)$. Acta Arithmetica, Tome 110 (2003) no. 3, pp. 275-298. doi : 10.4064/aa110-3-6. http://geodesic.mathdoc.fr/articles/10.4064/aa110-3-6/
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