From time to time I get asked for source code for open source components that we use. There is a handy Citrix page where you can find the third-party attributions here:
Open source code we have to ship due to license restrictions/conditions/attributions is available alongside the products it is used in. For example for the Linux Receiver the only component that needs to be shared is FFMPEG which can be found in the Receiver download page
under “Additional Components” section.