Third party notices
Citrix products often include third party code licensed to Citrix for use and redistribution under an open source license. In an effort to better inform its customers, Citrix publicizes open source code included within Citrix products in an open source licensed code list.
You can review the open source list here: https://www.citrix.com/buy/licensing/open-source.html
For additional source info, check here: https://www.citrix.com/downloads/citrix-receiver/receiver-for-android-source/htmlparser.html