1. Albeverio, S., Gesztesy, F., Hø egh-Krohn, R., Holden, H.: Point interactions in two dimensions: basic properties, approximations and applications to solid state physics. J. Reine Angew. Math. 380, 87–107 (1987)
2. Albeverio, S., Gesztesy, F., Høegh-Krohn, R.: The low energy expansion in nonrelativistic scattering theory. Ann. Inst. H. Poincaré Sect. A (N.S.) 37, 1–28 (1982)
3. Texts and Monographs in Physics;S Albeverio,1988
4. Albeverio, S., Gesztesy, F., Høegh-Krohn, R., Kirsch, W.: On point interactions in one dimension. J. Oper. Theory 12, 101–126 (1984)
5. London Mathematical Society Lecture Note Series;S Albeverio,2000