@article{10_4064_aa_14_4_399_407,
     author = {P. Tur\'an},
     title = {On the twin-prime problem {III}},
     journal = {Acta Arithmetica},
     pages = {399--407},
     publisher = {mathdoc},
     volume = {14},
     number = {4},
     year = {1968},
     doi = {10.4064/aa-14-4-399-407},
     language = {en},
     url = {http://geodesic.mathdoc.fr/articles/10.4064/aa-14-4-399-407/}
}