Concurrency Control, Transaction Isolation and Serializability in SQL92 and Oracle

Concurrency Control, Transaction Isolation and Serializability in SQL92 and Oracle7 - possibly the main document for citation about Oracle-specific levels of tx-isolation:
+ Oracle Consistent Read
+ Snapshot Isolation

P.S. I found it from this post - Generalized Isolation Level Definitions.
"... and Gemstone [22] and Oracle [24] provide serializability and Snapshot Isolation, respectively, using multi-version optimistic implementations."
"...
[24] Oracle Corporation. Concurrency Control, Transaction Isolation and Serializability in SQL92 and Oracle7, July 1995.
..."