Hyperfine spin-spin interaction and Zeeman effect in the pure bound field theory A. L. Kholmetskii, O. V. Missevitch and T. Yarman Eur. Phys. J. Plus, 127 4 (2012) 44 Published online: 25 April 2012 DOI: 10.1140/epjp/i2012-12044-8