TY  - JOUR
AU  - Thomas Curtright
TI  - Potentials Unbounded Below
JO  - Symmetry, integrability and geometry: methods and applications
PY  - 2011
VL  - 7
UR  - http://geodesic.mathdoc.fr/item/SIGMA_2011_7_a41/
LA  - en
ID  - SIGMA_2011_7_a41
ER  -