Hi Joost,
These two introductory pages provide some more information:
The algorithms do follow the references provided in the documentation as close as possible. That said, the literature doesn't answer all the questions and implementation details, so there are definitely custom additions on top of it. A small example of this is the "history" track logic with JPDA tracker. By using a hit/miss threshold, you can perform track confirmation and deletion with an "easy-to-configure" track maintenance logic.
If you are looking to see more documentation on some specific topics, please reach out to the support team and create a request.
Thanks,
Prashant
