Link to last version of stateful page

Link to last version of stateful page

I have a number of stateful pages with some state for each page. For
example each page has a form that was submitted.
How can I organize a menu with links to last versions of these stateful
pages? Should I store anywhere (may be in the session) reference to
appropriate object for each page? If I use
onClick() { setResponsePage(MyPage.class); }
than I lose the previous state of the page. I want to link to last state
of the page.