CSV import reference field

Hi,

I want to know How to import data to reference field ?
In my case i want to import to ir.property.

now i check in auto-detect at gtk,web it not detect field "value_reference"
--- auto-detect values ---
'.id': u'Database ID',
 'company_id': 'Company',
 'company_id.id': u'Company/Database ID',
 'company_id/id': 'Company/ID',
 'fields_id': 'Field',
 'fields_id.id': u'Field/Database ID',
 'fields_id/id': 'Field/ID',
 'id': 'ID',
 'name': 'Name',
 'type': 'Type',
 'value_binary': 'Value',
 'value_datetime': 'Value',
 'value_float': 'Value',
 'value_integer': 'Value',
 'value_text': 'Value'

Thanks