When defining References Views display, no CSS classes can be added to rows (in difference to other display types like Page or Block).
So I try to output taxonomy tags with custom CSS classes using fields and get this:
<span class="field-content tag1-tag2-tag3">Tag1, Tag2, Tag3</span>
Now again I would need to output every taxonomy tag as a separate class. I would need spaces instead of - so the output would be something like that:
<span class="field-content tag1 tag2 tag3">Tag1, Tag2, Tag3</span>
I suppose that there is a bug in "references_plugin_style.inc" file from References plugin...