@article{10_4064_cm6970_12_2016,
     author = {Yusuke Fujisawa},
     title = {On some arithmetical functions and the number of pure number fields},
     journal = {Colloquium Mathematicum},
     pages = {275--290},
     publisher = {mathdoc},
     volume = {149},
     number = {2},
     year = {2017},
     doi = {10.4064/cm6970-12-2016},
     language = {en},
     url = {http://geodesic.mathdoc.fr/articles/10.4064/cm6970-12-2016/}
}