An extension and a refinement of van der Corput's inequality. - Jian Cao; Da-Wei Niu; Feng Qi 001 (Int. J. Math. Math. Sci., 2006)

A generalization of van der Corput's inequality. - Feng Qi 001; Jian Cao; Da-Wei Niu (Appl. Math. Comput., 2008)

Closed formulas and identities on the Bell polynomials and falling factorials. - Feng Qi 001; Da-Wei Niu; Dongkyu Lim; Bai-Ni Guo (Contributions Discret. Math., 2020)