The spin and pseudospin symmetries in the relativistic formalism: Similarities and differences S. Marcos, V. N. Fomenko, M. López-Quelle, R. Niembro and L. N. Savushkin Eur. Phys. J. A, 26 2 (2005) 253-264 Published online: 15 December 2005 DOI: 10.1140/epja/i2005-10177-0