%0 Journal Article %A Patricio A. Felmer %A Salomé Martínez %A Kazunaga Tanaka %T On the number of positive solutions of singularly perturbed 1D NLS %J Journal of the European Mathematical Society %D 2006 %P 253-268 %V 8 %N 2 %I mathdoc %U http://geodesic.mathdoc.fr/articles/10.4171/jems/51/ %R 10.4171/jems/51 %F JEMS_2006_8_2_a9