1. P. Erdős, A. Hajnal, A. Mate, R. Rado, Combinatorial set theory. Partitions Relations for Cardinals, Studies in Logic and Foundations of Mathematics, North-Holland Publishing Company, vol. 106, 1984.
2. Groups of Polynomial growth and expanding maps;Gromov;Publ. Math. IHES Bures Sur Yvette,1981
3. Y. Gryshko, Monochrome symmetric subsets in 2-colorings of groups, Electron. J. Combin. 10 (2003); http:www.combinatorics.org/Volume_10/Abstracts/v10i1r28.html
4. Asymmetrically resolvable abelian groups;Protasov;Mat. Zametki,1996
5. Monochromatic symmetric subsets in colorings of abelian groups;Protasov;Dopovidi NAN Ukrain.,1999