The spin and pseudospin symmetries in the relativistic formalism: Similarities and differencesS. Marcos, V. N. Fomenko, M. López-Quelle, R. Niembro and L. N. SavushkinEur. Phys. J. A, 26 2 (2005) 253-264DOI: https://doi.org/10.1140/epja/i2005-10177-0