@article{COMIM_2006_14_1_a4,
     author = {Ericksen, Larry},
     title = {Iterated digit sums, recursions and primality},
     journal = {Communications in Mathematics},
     pages = {27--35},
     year = {2006},
     volume = {14},
     number = {1},
     mrnumber = {2298910},
     zbl = {1148.11007},
     language = {en},
     url = {http://geodesic.mathdoc.fr/item/COMIM_2006_14_1_a4/}
}