1. [5] Grundman, H. , Harrington, J. and Wong, T. W. H. , ‘Arithmetic progressions of $b$ -Niven numbers’, Rocky Mountain J. Math., to appear.
2. Counting the number of twin Niven numbers
3. Construction of
$2\ast n$
consecutive
$n$
-Niven numbers;Wilson;Fibonacci Quart.,1997
4. On the counting function for the Niven numbers
5. On consecutive Niven numbers;Cooper;Fibonacci Quart.,1993