diff --git a/2021-07-17.md b/2021-07-17.md
index 624c143be..5e8c0c14f 100644
--- a/2021-07-17.md
+++ b/2021-07-17.md
@@ -1,7 +1,8 @@
 - [[push]] [[read]]
 	- [[push]] [[a rosetta stone]]
-		- [[go]] https://arxiv.org/abs/0903.0340
-			- https://twitter.com/karlicoss/status/1416406388109156353
+		- https://twitter.com/karlicoss/status/1416406388109156353
+			- [[go]] https://arxiv.org/abs/0903.0340
+		- [[pdf]] https://arxiv.org/pdf/0903.0340.pdf
 - [[push]] [[lorand]]
 	- wants to build a [[jekyll]] site
 	- [[digital garden]] but also: