Resources

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Perl documentation:

• perlreftut - Mark Jason Dominus's very short tutorial about references
• perllol - Arrays of Arrays
• perldsc - Data Structure Cookbook
• perlref - Perl references and nested data structures
• perldata - Perl data types

Books:

• Perl Objects, References & Modules (Intermediate Perl)
• Advanced Perl Programming 1st edition !
• Object Oriented Perl