TY  - JOUR
AU  - Barry Simon
TI  - A new approach to inverse spectral theory. I: Fundamental formalism
JO  - Annals of mathematics
PY  - 1999
VL  - 150
IS  - 3
PB  - mathdoc
UR  - http://geodesic.mathdoc.fr/item/AM_1999_150_3_a6/
ID  - AM_1999_150_3_a6
ER  -