diff --git a/derivative_work.md b/derivative_work.md
index b0da414..ad97230 100644
--- a/derivative_work.md
+++ b/derivative_work.md
@@ -7,3 +7,5 @@
 * Slides were used in a [presentation about effective data visualisation](https://widdowquinn.github.io/Presentation-DataVis-Barplots/).
 
 * Might use some of it at [Data Science Africa 2018](https://www.datascienceafrica.org/dsa2018/).
+
+* Quoted some slides and linked back to the talk in talks at [Swansea University](https://edbennett.github.io/swansea-talk-20220629) and [Maynooth University](https://edbennett.github.io/maynooth-talk-20221024)