Update README.md

Author: MarcoMinghini

2024/2024-07-03 FOSS4G Europe 2024/README.md

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-# FOSS4G Europe 2024
+# FOSS4G 2024
+These presentations were given at [FOSS4G Europe 2024](https://2024.europe.foss4g.org), held in Tartu, Estonia on July 1-7, 2024. They can be cited as follows:
+
+* Minghini M., Thabit Gonzalez S. and Gabrielli L. (2024) Pan-European open building footprints: analysis and comparison in selected countries. _FOSS4G Europe 2024_, July 1-7, 2024 [[pdf](FOSS4GE_Buildings.pdf)]
 
-Placeholder for FOSS4G Europe 2024 presentations