in reply to two-dimentional arrays?
perlreftut is the Perl references tutorial. It's shorter than perlref and leaves out a lot of stuff that is rarely used. It also has a simple example.
It should be available in your documentation set that you got with Perl, but if you can't find it, it's available online at http://www.plover.com/~mjd/perl/FAQs/References.html.