Cant find issuelinks via Rest API

[Mumtaz Ahmad]

I am trying to fetch information of a particular Jira issue using rest API.

/rest/api/latest/search?jql=key=NUMR-572&maxResults=1&fields=key,status,summary,customfield_11642,customfield_11643,timeoriginalestimate,timespent,labels,assignee,created,issuetype,issuelinks,emailAddress,aggregatetimespent,subtask

But i can't find issuelinks field in response, though they are present as i can see them when i login on Jira UI . What may be the issue 

[Alexey Matveev]

Hello, 
I just executed api/2/issue/{issueIdOrKey} REST API function and I could see issuelinks in the response json. What REST API function do you use?