Dear Sirs, in the section 'QAWS adaptive integration for singular functions' there is a misprint W(x) = (x-a)^alpha (b-x)^beta log^mu (x-a) log^nu (b-x) where \alpha < -1, \beta < -1, and \mu = 0, 1, \nu = 0, 1. becomes where \alpha > -1, \beta > -1, and \mu = 0, 1, \nu = 0, 1. Best Regards Mario