diff --git a/db/nosql/clickhouse/feature/internals.txt b/db/nosql/clickhouse/feature/internals.txt
index 0175b2f0f..e53730678 100644
--- a/db/nosql/clickhouse/feature/internals.txt
+++ b/db/nosql/clickhouse/feature/internals.txt
@@ -23,6 +23,7 @@ https://clickhouse.com/docs/en/optimize/skipping-indexes
     ... alter table <> materialize index <> ... to apply newly added index
 
 2024
+https://altinity.com/blog/how-we-stopped-our-clickhouse-db-from-getting-crushed
 https://altinity.com/blog/learning-to-appreciate-monotonic-functions-in-clickhouse
     https://github.com/ClickHouse/ClickHouse/blob/master/src/Functions/toYear.cpp
     https://github.com/ClickHouse/ClickHouse/blob/6dd675579f0df1004ea3ab55e6a9793d176af2a5/src/Functions/IFunctionDateOrDateTime.h#L47
diff --git a/pl/java/features/collections/presentations.txt b/pl/java/features/collections/presentations.txt
new file mode 100644
index 000000000..d714e3ac4
--- /dev/null
+++ b/pl/java/features/collections/presentations.txt
@@ -0,0 +1,3 @@
+2022
+CSC - Valeev - Generic Types and Collections of 1:45:40
+    https://www.youtube.com/watch?v=fFNxOlQR55E