What you are doing are references to a sub. Here are some examples of refs and anonymous subs.

use strict;
#this is variable holding a ref to an anon sub
my $mysub1 = sub { print "mysub1 called\n" };
#this is a regular subroutine
sub mysub2 {
    print "mysub2 called\n";
}
#call this with a refrerence to an array sub references
sub take_subs { 
    my @arrayofsubs= @{$_[0]};
    print "take_subs called, now calling each subref\n";
    foreach (@arrayofsubs) {
        &$_;
    }
}
# call take_subs with each type
take_subs ([ 
    $mysub1,  # variable holding anon sub reference
    \&mysub2, # sub reference
    sub { print "anonymous sub called\n" } #anon sub
]);

__OUTPUT__
take_subs called, now calling each subref
mysub1 called
mysub2 called
anonymous sub called
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flounder