One way to find out who has cited the article is to use the Cited By tool in Google Scholar.
Type the title of the article in quotes in the search field:
Locate your article in the search results, and look for the Cited By link included in the article citation. This is approximately how many times the article has been cited by other scholars, which gives you a sense its impact:
Select the Cited By link for a list of the articles and sources that cited the article: