Q. How can I find out if an article been cited by other authors?

Citation information is available on Google Scholar: https://scholar.google.com/

Using the Advanced Search option, the name of the author can be searched.

The results of a Google Scholar search contain scholarly and non-scholarly links, including links to conference papers, presentations and other types of media.

For more information, read here: Google Scholar Profiles (https://scholar.google.com/intl/en/scholar/citations.html#citations)