diff --git a/README.md b/README.md
index 9bea9c4..3afd118 100644
--- a/README.md
+++ b/README.md
@@ -248,7 +248,7 @@ For all profiles:
 sudo nix-collect-garbage --delete-older-than 14d
 ```
 
-Remove old generations from EFI:
+Remove leftover EFI entries of removed generations:
 
 ```shell
 sudo /run/current-system/bin/switch-to-configuration boot
diff --git a/modules/btrbk/README.md b/modules/btrbk/README.md
index 2abef6f..9f8bbd4 100644
--- a/modules/btrbk/README.md
+++ b/modules/btrbk/README.md
@@ -9,6 +9,10 @@
 - Take snapshots (on same disk)
 - Create multiple backups (on different disks) over SSH
 
+Further resources:
+- https://nixos.wiki/wiki/Btrbk
+- https://wiki.gentoo.org/wiki/Btrbk
+
 ## Snapshots and Backups
 
 subvolume: <subvolume-name>