foreach (keys %{$ASDF{ABC}{ASDF}}) {
   print($_, ' => ', $ASDF{ABC}{ASDF}{$_}, $/);
}

##</code><code>##

my $hash_ref = $ASDF{ABC}{ASDF};
foreach (keys %$hash_ref} {
   print($_, ' => ', $$hash_ref{$_}, $/);
}