2026-07-072026-07-07http://salesiana.dossiersoluciones.com/handle/123456789/83137The method of integral transforms is reviewed. In the framework of this method reaction observables are obtained with the bound--state calculation techniques. New developments are reported.18 pages, Latex, 2 Postscript figures, to appear in Phys. At. Nucl., replacement: additional references to the literature and other small modificationsNuclear TheoryMathematical PhysicsComputational Physicstext