... subsequences with a given sum in a nite abelian groupGerard Jennhwa Chang,123Sheng-Hua Chen,13Yongke Qu,4Guoqing Wang,5Đand Haiyan Zha ng6ả1Department of Mathematics, National Taiwan University, ... Wang, A quantitative aspect of non-uniquefactorizations: the Narkiewicz constants, International Journal of Number Theory,to appear.[13] W.D. Gao and J.T. Peng, On the number of zero -sum subsequences ... 278, Chapman & Hall/CRC,2006.[15] A. Geroldinger, Additive group theory and non-unique factorizations, Combinatorial Number Theory and Additive Group Theory, Advanced Courses in Mathematics...