In the reference chapter

1. List of references
2. Each reference has a code and a replacement definition of the "Ref #"
3. The code is used within the rest of the rst documents
4. when we add a new reference to the list, we may need to redefine the "replacement definitions" of all subsequent references


ra1_references.rst

"Network Functions Virtualisation (NFV); Terminology for Main Concepts in NFV", January 2020. Available at https://www.etsi.org/deliver/etsi_gr/NFV/001_099/003/01.05.01_60/gr_NFV003v010501p.pdf

.. |gr_NFV003v010501p| replace:: [1]

“Key words for use in RFCs to Indicate Requirement Levels”, S. Bradner, March 1997. Available at http://www.ietf.org/rfc/rfc2119.txt
“Network Functions Virtualisation (NFV); Architectural Framework”. Available at https://www.etsi.org/deliver/etsi_gs/NFV/001_099/002/01.02.01_60/gs_NFV002v010201p.pdf

.. |gs_NFV002v010201p| replace:: [2]

“Network Functions Virtualisation (NFV) Release 3; Architecture; Report on the Enhancements of the NFV architecture towards "Cloud-native" and "PaaS" ”. Available at https://www.etsi.org/deliver/etsi_gr/NFV-IFA/001_099/029/03.03.01_60/gr_NFV-IFA029v030301p.pdf

.. |gr_NFV-IFA029v030301p| replace:: [3]

“Network Functions Virtualisation (NFV) Release 3; Testing; NFVI Compute and Network Metrics Specification”. Available at https://www.etsi.org/deliver/etsi_gs/NFV-TST/001_099/008/03.02.01_60/gs_NFV-TST008v030201p.pdf

.. |gs_NFV-TST008v030201p| replace:: [4]

“Network Functions Virtualisation (NFV) Release 2; Management and Orchestration; Performance Measurements Specification”. Available at https://www.etsi.org/deliver/etsi_gs/NFV-IFA/001_099/027/02.04.01_60/gs_nfv-ifa027v020401p.pdf

.. |gs_nfv-ifa027v020401p| replace:: [5]