@article{JIS_2003__6_2_a3,
     author = {De Koninck,  Jean-Marie and Doyon,  Nicolas},
     title = {Large and small gaps between consecutive {Niven} numbers},
     journal = {Journal of integer sequences},
     year = {2003},
     volume = {6},
     number = {2},
     zbl = {1041.11007},
     language = {en},
     url = {http://geodesic.mathdoc.fr/item/JIS_2003__6_2_a3/}
}