To start a reference check for Kristie S., one of the applicants, you click the Find References link. LinkedIn displays all the positions in Kristie’s profile and highlights the common position between each result and Kristie in the search results. This will help you determine whether the person in the search result worked alongside the applicant.
Scroll through the search results and look for someone to approach to request a reference for your applicant. Preferably, you want someone who is only two or three degrees away from you because then you can use a first-degree connection to introduce yourself to this person and that might encourage the other person (who is two or three degrees away) to respond.