Steve McClure, IDC Though outdated, this paper helps to understand the difference between ODBMS and ORDBMS. LINK
Quintin Cutts, Antony Hosking LINK (PDF)
Eliot Moss, Antony Hosking LINK (PDF)
Malcolm Atkinson et.al. A key document in the ODBMS history. LINK to Download paper. Abstract This paper attempts to define an object-oriented database system. Main features and characteristics that a system must have...
ODMG.ORG A collection of ODBMS resources related to the ODMG standard as of 2001, hosted by ODBMS.ORG. LINK