1. SIMPLE IONIZATION OF MOLECULAR HYDROGEN BY POSITRON AND ELECTRON IMPACT. Authors: SZ. NAGY, L. NAGY, R.I. CAMPEANU.2. DWBA CALCULATIONS FOR POSITRON IMPACT IONIZATION OF O2. Authors: I.F. TÓTH, R.I. CAMPEANU, VASILE CHIŞ, L. NAGY.3. ELECTRON IMPACT IONIZATION OF KR AND XE. Authors: R.I. CAMPEANU.4. CALCULATIONS ON e+ - N2 IONIZATION. Authors: L. NAGY, I. TÓTH, R.I. CAMPEANU.