The source information answers the question:” Where can I find more detail on the definition, extract or conclusion?”
Goal 60% <- SRA section 6.4.
SRA: Source: IEEE Annals of Semiconductor Research Abstracts.
There can be more than one source reference and this is generally handled by giving a list of sources in the Set parenthesis: For example:
If you feel strongly writing the plural (Sources”), it is OK but not logically necessary. The source is the set!
Keyed-Icons]: [Source *135]: <-- (example Product <-Source).
This Concept entered by Adore Shuko.