diff --git a/docs/routing/bird/rtt.md b/docs/routing/bird/rtt.md
index 80744bc..5e2b946 100644
--- a/docs/routing/bird/rtt.md
+++ b/docs/routing/bird/rtt.md
@@ -25,5 +25,6 @@ There is also the `max-rtt-penalty` setting, which specifies how quickly old RTT
 ## Links
 
 - [Explanation of the default values](https://bird.network.cz/pipermail/bird-users/2024-July/017764.html) [[Alternative service](https://www.mail-archive.com/bird-users@network.cz/msg07657.html)]
-- [Explanation of `rtt-min` and `rtt-max`]() [[Alternative service](https://www.mail-archive.com/bird-users@network.cz/msg08194.html)]
+- [Explanation of `rtt-min` and `rtt-max`](https://trubka.network.cz/pipermail/bird-users/2024-July/017764.html) [[Alternative service](https://www.mail-archive.com/bird-users@network.cz/msg08194.html)]
+- [Explanation of `rtt-cost` and `rtt-decay`](https://trubka.network.cz/pipermail/bird-users/2024-July/017766.html) [[Alternative service](https://www.mail-archive.com/bird-users@network.cz/msg08196.html)]
 - [rtt at the re6st mesh network](https://alioth-lists.debian.net/pipermail/babel-users/2024-July/004176.html)