Results lists can be sorted in both descending and ascending order.

Relevancy

This option, which is currently undergoing revision, takes into account both the closeness of the query match and the paper’s citation count.

Publication Date

This option sorts based on a paper’s publication date (month and year).

Citation Count

This option sorts based on a paper’s number of citations.

Recent Reads

This option is a measure of recent popularity. It sorts on the 90-day read count of a paper: the number of times a paper has been accessed in the ADS in the last 90 days.