@article{10_4064_aa_11_2_147_161,
     author = {P. Tur\'an and Stanis{\l}aw Knapowski},
     title = {Further developments in the comparative prime-number theory {IV}},
     journal = {Acta Arithmetica},
     pages = {147--161},
     publisher = {mathdoc},
     volume = {11},
     number = {2},
     year = {1965},
     doi = {10.4064/aa-11-2-147-161},
     language = {en},
     url = {http://geodesic.mathdoc.fr/articles/10.4064/aa-11-2-147-161/}
}