Lots has been written and published on Oscar Wilde and his works, including The Importance of Being Earnest.
You're welcome to try anyone of the resources listed below.
LibrarySearch provides a simple, one-stop search for books, articles, videos, recordings, and more. Items from St. Thomas and other regional libraries can be requested online and delivered to the St. Thomas library of your choice.
Please consider adding this feature to your Browser:
A browser add-on for Chrome that facilitates access to articles available from UST Library subscriptions without needing to go to the library website. This would be especially helpful to you when using Google Scholar and other databases that are not 100% full-text.