Since all or your articles must be recent, it would be most efficient for you to limit your results to a particular date range, so you won't have to look through articles that are too old for you to use. On the page with the result list, open the drop-down arrow next to Publication Year.
Since you cannot limit it by month, you will have to limit it to one year. You may not be able to find articles written within the last 6 months. Be sure to check with Professor Montemurro if you are in doubt.