How does require find the module to be loaded?
Modules in Perl
Perl 4 libraries
What is @INC in Perl?
What is the difference between require and use in Perl? What does import do?
Global symbol requires explicit package name
Always require explicit importing of functions
Traversing a directory tree, finding required files
Minimal requirement to build a sane CPAN package
How to declare requirements of a CPAN distribution?
Moo and required attributes