diff --git a/README.md b/README.md
index 089291c..152df1c 100644
--- a/README.md
+++ b/README.md
@@ -13,3 +13,11 @@ vittime della *smartificazione* prossima ventura.
 
 [PDF slide](smartcity-slide.pdf)
 
+
+per ottenere i PDF è stato usato [pandoc](https://pandoc.org/)
+
+    pandoc smartcity-paper.md -o smartcity-paper.pdf
+
+    pandoc -t beamer -V theme:Singapore smartcity-slide.md -o smartcity-slide.pdf
+
+howto: [slidol](https://git.abbiamoundominio.org/dan/slidol)