If you use ELIIXS, we only ask that you acknowledge it appropriately in any publications by using the following reference:

J. P. Santos and M. Guerra (2012), Electron Impact Ionization Cross-Sections Database (version 1.1). [Online] Available: http://sites.fct.unl.pt/eliixs [Acess date]. LIBPhys, NOVA School of Science And Technology, Universidade NOVA de Lisboa.

Citation Form: Author/editor (Year), Title (edition). [Type of medium] Available: URL [Access date].

When ELIIXS data are incorporated into other databases, we kindly ask to indicate which version has been incorporated to avoid confusion.