@article{10_4064_aa160_3_3,
     author = {Harold G. Diamond and Wen-Bin Zhang},
     title = {Optimality of {Chebyshev} bounds
 for {Beurling} generalized numbers},
     journal = {Acta Arithmetica},
     pages = {259--275},
     publisher = {mathdoc},
     volume = {160},
     number = {3},
     year = {2013},
     doi = {10.4064/aa160-3-3},
     language = {en},
     url = {http://geodesic.mathdoc.fr/articles/10.4064/aa160-3-3/}
}