Restored "How to reference f#" link. Removed "member roster" link.

Author: IanWitham

_includes/navbar.html

@@ -169,7 +169,7 @@
                             <a role="menuitem" href="https://foundation.fsharp.org">Mission statement</a>
                             <a role="menuitem" href="https://foundation.fsharp.org/join">Join</a>
                             <a role="menuitem" href="https://foundation.fsharp.org/announcements">Announcements</a>
-                            <a role="menuitem" href="https://foundation.fsharp.org/member_roster">Member Roster</a>
+                            <!-- <a role="menuitem" href="https://foundation.fsharp.org/member_roster">Member Roster</a> -->
                             <a role="menuitem" href="https://foundation.fsharp.org/code_of_conduct">Code of Conduct</a>
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                             <a role="menuitem" href="https://foundation.fsharp.org/logo">F# Logo</a>

teaching/research.md

@@ -11,6 +11,8 @@ students and researchers worldwide. Many standard F# features (including _active
 have been described in publications, and many
 research projects build on top of F#. 
 
+[How to reference F# in a research paper.](https://dsyme.home.blog/2012/07/10/how-to-reference-f-in-a-research-paper/)
+
 To add a paper to this list [edit this page](https://github.com/fsharp/fsharp.org/edit/gh-pages/teaching/research.md) and submit a pull request.
 
  * **[F# Books](../learn/index.html#books)** - books about the F# language, including practical guides for using F# in practice.