Author:
Aguilera-Navarro V. C.,de Llano M.,Plastino A.,Rossignoli R.
Reference12 articles.
1. H. Lipkin, N. Meshkov, A. Glick, Nucl. Phys. 62 (1965) 188, 199.
2. P.W. Anderson, Phys. Rev. 112 (1958) 1900.
3. M. Cambiaggio and A. Plastino, Z. Phys. A288 (1978) 153.
4. R. Gilmore and D. Feng, Nucl. Phys. A301 (1978) 189
5. R. Gilmore Catastrophe Theory for Scientists and Engineers, (Wiley, N.Y., 1981).