in reply to References quick reference
On the subject of complex data structures in Perl, be sure to read perllol and, especially, perldsc.
Hope that helps,
Not official, but I wrote this tutorial quite a few years ago after a bit of a hiatus that may be fruitful (well, at least a different take on the same subject).
An Englishman in New York
An American Werewolf in London
An American in Paris
The Innocents Abroad
An Idiot Abroad
Robinson Crusoe on Mars
A Connecticut_Yankee in King Arthur's Court
There and Back Again
Travels into Several Remote Nations of the World
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