%0 Journal Article %A Rafael de la Madrid %T The Analytic Continuation of the Lippmann–Schwinger Eigenfunctions, and Antiunitary Symmetries %J Symmetry, integrability and geometry: methods and applications %D 2009 %V 5 %U http://geodesic.mathdoc.fr/item/SIGMA_2009_5_a42/ %G en %F SIGMA_2009_5_a42