my @array1 = (
'abc',
'def',
'ghi',
'jkl'
);

my $s1 = \@array1;
my $s2 = \$s1; 

my %hash = ( 'key' => $s1 );
my $hash_s = \%hash;

print(@$$s2); # works
print(@$$hash{'key'}); # doesn't work