1. A. Bialostocki, M. Lotspeich, Some developments of the Erdős–Ginzburg–Ziv theorem I, in: Sets, Graphs and Numbers, Budapest, 1991, pp. 97–117, Colloquia Mathematica Societatis János Bolyai, vol. 60, North-Holland, Amsterdam, 1992.
2. Conditions for a zero sum modulo n;Bovey;Canad. Math. Bull.,1975
3. Minimal zero-sequences and the strong Davenport constant;Chapman;Discrete Math.,1999
4. Problems and results on combinatorial number theory;Erdős,1973
5. Theorem in the additive number theory;Erdős;Bull. Res. Counc. Israel,1961