1. Polynomial oscillators in Heisenberg picture

   • M. Znojil

   OriginalPaper Pages: 201 - 208

2. Results from the UA 2 experiment at the CERN p¯p Collider

   • Patrizia Cenci

   OriginalPaper Pages: 209 - 235

3. Search of theH particle in antiproton-nuclear interactions

   • Carlo Guaraldo
   • Angelo Maggiora
   • Aldo Zenoni

   OriginalPaper Pages: 236 - 244

4. Elastic scattering of positrons by argon atoms

   • Ali H. Moussa
   • Hamed H. Eissa
   • Sabbah A. Elkilany

   OriginalPaper Pages: 245 - 257

5. Nonlinear electric dipole polarizations of centrosymmetric media at the interaction of fundamental and second harmonic waves

   • P. Chmela
   • P. Dub

   OriginalPaper Pages: 258 - 271

6. Status of the Asterix IV iodine laser

   • H. Baumhacker
   • G. Brederlow
   • K. J. Witte

   OriginalPaper Pages: 272 - 276

7. Resonant electronic Raman scattering on donor levels in cubic semiconductors

   • Nguyen Que Huong
   • Nguyen Ai Viet

   OriginalPaper Pages: 277 - 288

8. Quantum open systems in a two-state stochastic reservoir

   • Jerzy Łuczka

   Letters to the Editor Pages: 289 - 292

9. Kinetics of azide binding to chloro- and horseradish peroxidase in water and reversed micelles

   • J. F. Holzwarth
   • D. Jobe
   • H. B. Dunford

   Letters to the Editor Pages: 293 - 295

10. Hadron structure '91

    Announcement Pages: 296 - 296