1. Boson fields under a general class of local relativistic invariant interactions

   • Raphael Høegh-Krohn

   OriginalPaper Pages: 171 - 184

2. A local relativistic Boson field with the λ|ϕ| interaction

   • Raphael Høegh-Krohn

   OriginalPaper Pages: 185 - 194

3. A proof of the existence of phase transitions in the anisotropic Heisenberg model

   • Derek W. Robinson

   OriginalPaper Pages: 195 - 204

4. Existence of phase transitions for quantum lattice systems

   • J. Ginibre

   OriginalPaper Pages: 205 - 234

5. The physical states of Fermi systems

   • Salvador Miracle-Sole
   • Derek W. Robinson

   OriginalPaper Pages: 235 - 270