i have only advanced search url of any educational site. i successfully fetched the form information of advanced page and made a request exactly same as source is making with the help of following code.

my @forms = HTML::Form->parse($res);
    @forms = grep{$_->attr('name') eq 'EntrezForm'} @forms;
    my $form = shift @forms;  

my $req = $form->click('EntrezSystem2.PEntrez.Pubmed.Pubmed_AdvancedSe
+arch.Pubmed_AdvancedSearchBox.Search');
return $req;
[download]

So Please tell me what else i can do to fetch the 1st page url and further more pages url.....