While there aren't many references dedicated to autovivification, it's often mentioned in passing while analysing other topics.

• Autovivification (wikipedia)
• What is autovivification? (perlmaven)

perldoc:

• delete (search for WARNING:)
• exists (search for WARNING:)
• perlref (search for autoviv)

Golf (in Perl, Python, Ruby, PHP):

• The golf course looks great, my swing feels good, I like my chances (Part V) (search for autoviv)
• The golf course looks great, my swing feels good, I like my chances (Part VI) (search for autoviv)
• Re: The golf course looks great, my swing feels good, I like my chances (Part VI) (search for autoviv)
• Re^2: Honest question about Perl, Python and Ruby (autovivification) (search for autoviv)

Other:

• Autovivification Oddity by haukex (2018)
• Re: Autovivification Oddity by QM (2018)
• Truth and Falsehood and Re^2: Truth and Falsehood by haukex (2019)
• 5.24 -> 5.28 -- what has changed in autovivification? by leszekdubiel (2020)

• Using exists to check element in array by david (2024)
• Perl autovivifyies object property when using exists by nysus (2024) - responses mention no autovivification using CPAN autovivification

CPAN:

• autovivification by Vincent Pit - lexically disable autovivification
• Tie::Hash (perldoc)
• Tie::Hash::Vivify by DCANTRELL - create hashes that autovivify in interesting ways
• Data::Diver by tye - simple, ad-hoc access to elements of deeply nested structures

Other cool autovivification references welcome.

Added later:

• Arrow Operator Question by sectokia (2023)
• Defined test creates non-empty hash value by glendeni (2024) - responses mention no autovivification using CPAN autovivification

👁️🍾👍🦟

In fact quite different.