Memory-Efficient Key/Foreign-Key Join Size Estimation via Multiplicity and Intersection Size. - Magnus Müller; Daniel Flachs; Guido Moerkotte (ICDE, 2021)

The 3D Hash Join: Building On Non-Unique Join Attributes. - Daniel Flachs; Magnus Müller; Guido Moerkotte (CIDR, 2022)

Made to Measure: Towards Approximability of Query Evaluation Engines. - Daniel Flachs; Guido Moerkotte (IDEAS, 2024)