Oracle Database Version History | Oracle Release Versions
Preparing for the installation Oracle Database 12c Release 2
Oracle Database Extended Support Deadlines: What to Know | Datavail
The state of the flagship as per Oracle OpenWorld 2016 – Oracle Database 12c Release 2, Exadata Express Cloud Service, SQL and PL/SQL | AMIS, Data Driven Blog - Oracle & Microsoft Azure
Donghua's Blog - DBAGlobe: Oracle Database 12c Release 1 Patchset 1 (12.1.0.2) is being released only as Enterprise Edition at this time (Doc ID 1905806.1)
Oracle 12c End of Life: Roadmap & Strategy when Upgrading to EBS R12.2.x - IT Convergence