Google has added a new method of refining certain search results – “Top References”.
This seems to be a very limited bucket test at the moment as we were not able to replicate it on any further searches. We will update the posts if/when we can get some better screenshots!
The functionality seems to be that the filter allows you to search through all the existing search results for “roses” to show “Pages mentioning” the reference used to refine the search.
The interesting part of this feature is that unlike other filters the original search query in the search box doesn’t change.