Power corrections in e + e −→π + π −,K + K − and B→Kπ,ππ Murugesh Duraisamy and AlexanderL. Kagan Eur. Phys. J. C, 70 4 (2010) 921-925 Published online: 20 November 2010 DOI: 10.1140/epjc/s10052-010-1496-y