Reference
---------

| [1] ETSI GS NFV 002 (V1.1.1): “Architectural Framework”
| [2] ETSI GS NFV 003 (V1.1.1): "Terminology for Main Concepts in NFV".
| [3] ETSI GS NFV-SWA001:“Virtual Network Function Architecture”
| [4] ETSI GS NFV-MAN001:“Management and Orchestration”
| [5] ETSI GS NFV-REL001:"Resiliency Requirements"
| [6] QuEST Forum TL-9000:"Quality Management System Requirement
  Handbook"
| [7] Service Availability Forum AIS:"Software Management Framework"