@article{10_4064_aa_55_3_249_260,
     author = {Ti Xuan},
     title = {The average order of $d_{k}(n)$ over integers free of large prime factors},
     journal = {Acta Arithmetica},
     pages = {249--260},
     publisher = {mathdoc},
     volume = {55},
     number = {3},
     year = {1990},
     doi = {10.4064/aa-55-3-249-260},
     language = {en},
     url = {http://geodesic.mathdoc.fr/articles/10.4064/aa-55-3-249-260/}
}