Resaults from Google scholar search. Resaults from Science Direct search. See link

Notice: The three papers below are not allowed to download. These are their links only. You need to be in the educational net environmelt to see their abstracts.

Gauge hierarchy, Composite axion models and Planck scalephysics Planck-scale physics and the Peccei-Quinn mechanism The papers I collected are : (only part of them)