The [Datenbank-Spektrum](https://link.springer.com/journal/13222) has a special-issue on *[Trends in Information Retrieval Evaluation](https://link.springer.com/journal/13222/20/1)* that includes an [article on STELLA](https://link.springer.com/article/10.1007/s13222-020-00335-x) and it's overall idea and infrastructure.