Reihe International Series of Numerical MathematicsWolfgang Hackbusch × Integral EquationsTheory and Numerical TreatmentWolfgang HackbuschSpringer BaseleBook2012 Integral EquationsTheory and Numerical TreatmentWolfgang HackbuschSpringer BaselSoftcover2011 Integral EquationsTheory and Numerical TreatmentWolfgang HackbuschSpringer BaselHardcover1995