1. K. Rózsa, L. Csillag, M. Jánossy and T. Salamon, to be published.
2. CW laser oscillation in a hollow cathode He-Kr discharge
3. L. Csillag, M. Jánossy, K. Rózsa and T. Salamon, to be published.
4. Table of spectral lines of neutral and ionized atoms;Striganov,1966