1. Generation of the eigenvectors of the topological matrix from graph theory

   • Allen J. Kassman

   OriginalPaper Pages: 255 - 262

2. On the number of spin functions in the first order interaction space

   • Włodzisław Duch

   OriginalPaper Pages: 263 - 269

3. Ab initio valence bond calculations and the spin-paired diradical character of S ₄ ²⁺

   • Frances L. Skrezenek
   • Richard D. Harcourt

   OriginalPaper Pages: 271 - 274

4. Origin of the conical intersection between the singlet ionic excited surfaces of twisted ethylene

   • Padeleimon Karafiloglou
   • Jean-Paul Malrieu

   OriginalPaper Pages: 275 - 286

5. Importance of correlation in LiBO

   • A. V. Nemukhin
   • N. F. Stepanov

   OriginalPaper Pages: 287 - 292

6. Reduced classical trajectory equations for electronically non-adiabatic transition on photochemical pericyclic reactions

   • Kenji Morihashi
   • Osamu Kikuchi

   OriginalPaper Pages: 293 - 305

7. The virial theorem as an entail for Koopmans' theorem in atomic calculations

   • Rogério Custodio

   OriginalPaper Pages: 307 - 313

8. Bond orders and valences in the SCF theory: a comment

   • I. Mayer

   OriginalPaper Pages: 315 - 322

9. Electrostatic potentials, fields and field gradients from a general crystalline charge density

   • P. Herzig

   OriginalPaper Pages: 323 - 333

10. Book reviews

    • W. H. E. Schwarz
    • Robert J. Buenker

    BookReview Pages: 335 - 337