Pion mass dependence of the nucleon mass in the chiral quark soliton model K. Goeke, J. Ossmann, P. Schweitzer and A. Silva Eur. Phys. J. A, 27 1 (2006) 77-90 Published online: 20 February 2006 DOI: 10.1140/epja/i2005-10229-5