%0 Journal Article %A R. Carlone %A M. Correggi %A L. Tentarelli %T An introduction to the two-dimensional Schr\"odinger equation with nonlinear point interactions %J Nanosistemy: fizika, himiâ, matematika %D 2018 %P 187-195 %V 9 %N 2 %I mathdoc %U http://geodesic.mathdoc.fr/item/NANO_2018_9_2_a4/ %G en %F NANO_2018_9_2_a4