Literature citations

[Lestropie]

Note that this Issue is not of the same criticality as the other entries in #29, but I do nevertheless think it warrants conversation with invested parties outside of BEP016 development.

The current state of BEP016 has many literature citations, corresponding primarily to publications where various diffusion models are introduced. There is however, as far as I can see, no precedent for such set in the existing BIDS specification. Therefore do we:

1. Omit literature citations entirely from the specification;

2. Decide on and set a precedent regarding how such citations will be included in the specification documentation (I'm not aware of capabilities of Markdown in this respect so am deferring to expertise from others).

[Lestropie]

Note that there are literature citations within some parts of the specification, mostly inline with URLs included in the main text. So if handling of literature citations within the specification were to be changed, then I expect that the BIDS maintainers would prefer that an explicit PR be created with the specific purpose of changing the way that citations are handled, rather than that change being bundled in a modality-specific BEP.

[Lestropie]

In #92, explicit definition of reserved values for the "_param-" entity have been removed. A consequence of this is that citation of literature articles within the specification have been removed. To get back some lost ground I'm proposing in #101 having the ability to define for each parameter map file a URL that describes that one parameter. That is more extensible than having such baked into the specification. So I'm closing this as obsolete. If someone wishes to make a case subsequent to #92 either to have some mechanism by which to define citations in the specification for any reason, and/or to have reserved "_param-" values, that should be raised as a new Issue.