diff --git a/os/unix/filesystem/btrfs/articles.txt b/os/unix/filesystem/btrfs/articles.txt
index da4e634e4..704e43e09 100644
--- a/os/unix/filesystem/btrfs/articles.txt
+++ b/os/unix/filesystem/btrfs/articles.txt
@@ -1,3 +1,5 @@
+2023
+https://habr.com/ru/company/otus/blog/725424/
 2022
 https://habr.com/ru/company/veeam/blog/458250/
 2020
diff --git a/pl/rs/tools/fs-file-system/tree/erdtree.txt b/pl/rs/tools/fs-file-system/tree/erdtree.txt
new file mode 100644
index 000000000..2bd5925db
--- /dev/null
+++ b/pl/rs/tools/fs-file-system/tree/erdtree.txt
@@ -0,0 +1,2 @@
+https://crates.io/crates/erdtree
+https://github.com/solidiquis/erdtree