Berens Hubert; zu Castell Wolfgang: A class of summability methods of the inverse Fourier integral. In: Acta scientiarum mathematicarum, (70) 3-4. pp. 683-693. (2004)
Berens Hubert; Li Luoqing: The maximal Cesàro operator on Hardy spaces. In: Acta scientiarum mathematicarum, (66) 3-4. pp. 613-622. (2000)
Berens Hubert; Westphal Ursula: A Cauchy problem for a generalized wave equation. In: Acta scientiarum mathematicarum, (29) 1-2. pp. 93-106. (1968)