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I presented pgMemento at FOSSGIS 2015 (in german) and at FOSSGIS-NA 2016 . At FOSS4G 2017 I gave a more general overview on database versioning techniques.
Slides of the most up-to-date presentation (which are hopefully even easier to follow) can be found here. I gave the talk at the german PostgreSQL conference 2018, but the slides are in english.
A demo paper about pgMemento has been accepted at the 15th International Symposium for Spatial and Temporal Databases (SSTD) 2017 in Arlington, VA. You can find the publication here.