SOME REGULARITIES WITHIN THE STARK WIDTHS AND SHIFTS OF RESONANCE LINES OF SINGLY CHARGED IONS FROM He TO Ca J. Purik, I. Lakikevik and V. Glavonjik J. Phys. Colloques, 40 C7 (1979) C7-835-C7-836 DOI: 10.1051/jphyscol:19797403