Jonathan P. Farthing, Philip D. Chilibeck, Gord Binsted
Med Sci Sports Exerc. 2005 September; 37(9): 1594–1600.
“Cross-education with hand strength training occurs only in the right-to-left direction of transfer in right-handed individuals. We conclude that cross-education of arm muscular strength is most pronounced to the nondominant arm.”
http://www.ncbi.nlm.nih.gov/pubmed/16177613