A small enhancement for the "References" page

[triolo]

It would be nice to make the following enhancements of functionality on our "References" page:

• add interactive links in the source table, which will lead to the correspontent line of the "References" section
• group references by language, or add an supplementary section, where references will be presented according to this grouping
• also probably think of grouping references by author

[agricolamz]

@triolo, since there is a sortable table in references, I guess all you've wrote can be achieved simply by sorting a particular column, isn't it?

[agricolamz]

@triolo, I added links to the table in the Reference page