@article{JIS_2014__17_2_a1,
     author = {Nazardonyavi, Sadegh and Yakubovich, Semyon},
     title = {Extremely abundant numbers and the {Riemann} hypothesis},
     journal = {Journal of integer sequences},
     publisher = {mathdoc},
     volume = {17},
     number = {2},
     year = {2014},
     language = {en},
     url = {http://geodesic.mathdoc.fr/item/JIS_2014__17_2_a1/}
}