Dan Liu, Yankun Sui*, On Higher-Power Moments of  Delta((1))(x), Acta Mathematica Hungarica, 2020. (SCI)

Dan Liu, Yankun Sui*, On the error term Delta((k,l))(x), Ramanujan Journal, 2021. (SCI)

Dan Liu, Yankun Sui*, Sign changes of  Delta((1))(x), Journal of Number Theory, 2022. (SCI)

Yankun Sui, Dan Liu*, On the error term concerning the number of subgroups of the groups Zm×Zn with mn≤x, Journal of Number Theory, 2020. (SCI)