Physical Review. A; 75; 2; Other Information: DOI: 10.1103/PhysRevA.75.029906; (c) 2007 The American Physical Society; Country of input: International Atomic Energy Agency (IAEA)
Physical Review. B, Condensed Matter and Materials Physics; 75; 5; Other Information: DOI: 10.1103/PhysRevB.75.059903; (c) 2007 The American Physical Society; Country of input: International Atomic Energy Agency (IAEA)