Flashback version Between query in oracle

Flashback version between query used to track a table row in a specified time period

Syntax: VERSIONS BETWEEN TIMESTAMP [lower bound] AND [upper bound];

eg:
SELECT * FROM wf_notifications
VERSIONS  BETWEEN TIMESTAMP TO_TIMESTAMP('15-AUG-2012 08:13:07')
                                      AND TO_TIMESTAMP('15-AUG-2012 12:01:17')

        Where message_type = 'XXXX'