Momentum-dependent mean field in π0 production in Nb + Nb collisions G. Russo, A. Insolia, U. Lombardo and N. G. Sandulescu Eur. Phys. J. A, 24 3 (2005) 389-394 Published online: 02 June 2005 DOI: 10.1140/epja/i2004-10148-y