# references in a smaller font

How can I tell LyX to display the bibliographic references in a smaller font?

I use the standard "article" document class.

When I open the "Settings" of the bibliography, I get a dialog box where I can choose from many styles, but, most of them cause errors when I select them, so I use "plain". I haven't found a way to change the font size.

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This would be as easy as putting \small or similar before the \bibiliography command. But I don't use LyX, it might have made things unnecessarily complicated. –  Seamus Jan 14 at 13:00
As Seamus mentions in a comment, you can do this by adding a LaTeX command for changing font size, e.g. \small just before the bibliography. To add (La)TeX code in a LyX document, one has to write the code in a TeX code box, also known as an ERT (Evil Red Text), which is inserted by Insert --> TeX code, or the keyboard shortcut Ctrl + L.
However (see comment from Stephen), note that as \small and friends are just switches, all text that follows will also have the new font size. Hence, any text that is after the bibliography will also be \small. To make the change local to the bibliography, write a { before \small in the ERT, and add a second ERT just after the bibliography where you write a closing brace, }. This of course only necessary if you actually have anything after the bibliography. See screenshot below.
Maybe it would be advantageous to use \begin{small}...\end{small} instead of just \small, because \small will print everything behind it in small print. If the references are not followed by anything, it does not matter, of course. –  Stephen Jan 18 at 11:45