1. The characteristic polynomials of structures with pending bonds

   • K. Balasubramanian
   • M. Randić

   Original Investigations Pages: 307 - 323

2. The evaluation of ω parameters in contracted density product calculations

   • Franz Mascarello
   • Bruno Cuony
   • Werner Hug

   Original Investigations Pages: 325 - 333

3. Particles and holes in the unitary group method

   • Wen Zhen-yi

   Original Investigations Pages: 335 - 342

4. Many-body perturbation theory for open-shell systems. Expansion through fourth-order

   • Stephen Wilson

   Original Investigations Pages: 343 - 361

5. Heats of atomization of conjugated hydrocarbons by a new semiempirical method

   • Tomislav P. Živković

   Original Investigations Pages: 363 - 368

6. Electronic structure and one-electron properties of the MoO₂Cl₂ molecule. Electronic spectra of the MoO₂Cl₂, MoO₂Br₂ and WO₂Br₂ molecules

   • I. A. Topol
   • A. S. Chesnyi
   • N. F. Stepanov

   Original Investigations Pages: 369 - 377

7. A short CI expansion for a symmetry-adapted description of localized hole states: Application to the 3dσ_u hole state of the _Cu2 ⁺ ion

   • Marc Benard

   Original Investigations Pages: 379 - 385

8. Eine qualitative Deutung der Hückel-Parameter mit Hilfe der Katastrophentheorie

   • Rainer Brüggemann
   • Jürgen Voitländer

   Original Investigations Pages: 387 - 395

9. Comment on an improved LCAO SCF method for three-dimensional solids

   • Steef de Bruijn

   Short Communications Pages: 397 - 400

10. Comments on de Bruijn's criticisms on the paper entitled “an improved LCAO SCF method for three-dimensional solids”

    • Peter G. Perkins
    • Ashok K. Marwaha
    • James J. P. Stewart

    Short Communications Pages: 401 - 402

11. Erratum

    • Alain Strich
    • Alain Veillard

    Erratum Pages: 402 - 402