My ObjectOriented software actualy doesn't implement references to objects
I will consider to add this feature (using Storable).
But...
Actualy I try to implments an easy way to send my DATA to other Perl scripts and Applications (like R statistical package)
For this reason I try to make an easy_to_read DATA STRUCTURE (in this case4 is an HASH with reference to strings, array and other hash)
Data::Dumper is OK (from HASH to FILE).
DBM::Deep could be ok cause a file.db could be a reasonable solution
Make other tables into my MySQL server is nota good idea cause is really overheat (I use SQL to create the object)
Regards