LyX ⇒ modify text used in cross-referencing

[monamipierrot]

Hello,
I use a lot of cross-referencing but I don't like italian standard referencing
(for instance: <reference> on page <page>)
I want to change the whole "a pagina" (on page) with "a p." (on p.) and the same with variants like "opposite" which are very bad chosen.
Where I can find this?
Thanks,
Piero