Pion radii in the nonlocal chiral quark model A. E. Dorokhov, A. E. Radzhabov and M. K. Volkov Eur. Phys. J. A, 21 1 (2004) 155-159 Published online: 13 July 2004 DOI: 10.1140/epja/i2003-10177-0