1. S. Bulman-Fleming, E.T.H. Wang, On n-divisible subsequences, preprint, 1986.
2. H.W. Gould, Combinatorial Identities, Morgantown, W. Va., 1972.
3. Two theorems on the addition of residue classes;Guichard;Discrete Math.,1990
4. Note addition theorems on Zn;Li;Discrete Math.,1995
5. On the sum ∑k≡r(modm)nk and related congruences;Sun;Israel J. Math.,2002