ΔS = 0 effective weak chiral Lagrangianfrom the instanton vacuum Hee-Jung Lee, Chang Ho Hyun, Chang-Hwan Lee and Hyun-Chul Kim Eur. Phys. J. C, 45 2 (2006) 451-457 Published online: 09 December 2005 DOI: 10.1140/epjc/s2005-02442-3