On irregular prime power divisors of the Bernoulli numbers. - Bernd C. Kellner (Math. Comput., 2007)

Identities Between Polynomials Related to Stirling and Harmonic Numbers. - Bernd C. Kellner (Integers, 2014)

Power-Sum Denominators. - Bernd C. Kellner; Jonathan Sondow (Am. Math. Mon., 2017)

The Denominators of Power Sums of Arithmetic Progressions. - Bernd C. Kellner; Jonathan Sondow (Integers, 2018)