If I am reading your question correctly, there is also a simpler way to get what you want, as long as you don't need to define the structure in a single statement. Predefine your multiple references.
eg:

my $keyval1 = {
        'stuff' => 'more stuff',
        'other stuff' => 'even more stuff',
    };
%hash = (
    'key' => $keyval1,
    'ref to key' => $keyval1,
);
[download]

Data::Dumper will work with this structure if you set Purity to 1 (see Data::Dumper for the different ways to do this.
Good luck,

--JAS