TY - JOUR AU - Miloslav Znojil TI - Three-Hilbert-Space Formulation of Quantum Mechanics JO - Symmetry, integrability and geometry: methods and applications PY - 2009 VL - 5 UR - http://geodesic.mathdoc.fr/item/SIGMA_2009_5_a0/ LA - en ID - SIGMA_2009_5_a0 ER -