%0 Journal Article
%A S. Albeverio
%A S. Fassari
%A F. Rinaldi
%T The behaviour of the three-dimensional Hamiltonian $-\Delta+\lambda[\delta(x+x_0)+\delta(x-x_0)]$ as the distance between the two centres vanishes
%J Nanosistemy: fizika, himiâ, matematika
%D 2017
%P 153-159
%V 8
%N 2
%I mathdoc
%U http://geodesic.mathdoc.fr/item/NANO_2017_8_2_a0/
%G en
%F NANO_2017_8_2_a0