Title: The Electron-impact broadening effect in Stellar Atmospheres: Rare Earth Elements.
Author(s): L. C. Popovic, M. S. Dimitrijevic, S. Simic and N.Milovanovic 

ABSTRACT
The influence of the Stark broadening mechanism on line shapes and equivalent widths in stellar atmosphere has been considered. The test of this influence has been done for  Nd II, Eu II and Eu III lines. For calculations of the electron-impact widths we use the modified semi-empirical approach (MSE).