diff --git a/os/linux/nixos/nix-the-planet.txt b/os/linux/nixos/nix-the-planet.txt
new file mode 100644
index 000000000..e5c508dfd
--- /dev/null
+++ b/os/linux/nixos/nix-the-planet.txt
@@ -0,0 +1 @@
+https://github.com/MatthewCroughan/NixThePlanet
diff --git a/pages/books/manning.txt b/pages/books/manning.txt
index 39d7b186a..c8726475f 100644
--- a/pages/books/manning.txt
+++ b/pages/books/manning.txt
@@ -3,6 +3,7 @@ https://www.manning.com/books/contract-testing-in-action
 2023
 https://www.manning.com/books/azure-security-2
 https://www.manning.com/books/optimization-algorithms
+https://www.manning.com/books/platform-engineering-on-kubernetes
 2022
 live
     https://www.manning.com/liveproject/hands-on-with-cplusplus20-ranges-coroutines-concepts-modules
diff --git a/pl/java/libfws/spring/data/jpa/features/transaction-locks.txt b/pl/java/libfws/spring/data/jpa/features/transaction-locks.txt
index e7582bca5..b18332e1c 100644
--- a/pl/java/libfws/spring/data/jpa/features/transaction-locks.txt
+++ b/pl/java/libfws/spring/data/jpa/features/transaction-locks.txt
@@ -34,6 +34,7 @@ https://docs.spring.io/spring-data/jpa/docs/current/api/org/springframework/data
 MihailKeselyov - Transactions Theory and Practice 0:00 of 30:09
     https://www.youtube.com/watch?v=ovas9OCVfqo
 2023
+https://blog.devgenius.io/pessimistic-lock-in-spring-boot-a3c44055be0f
 https://www.baeldung.com/spring-transactional-propagation-isolation
     !!!
 https://www.linkedin.com/pulse/implementing-optimistic-pessimistic-locking-spring-boot-sanchez
diff --git a/science/ai/free/g4f-gpt4free.txt b/science/ai/free/g4f-gpt4free.txt
index 8232f11fc..4017a31bd 100644
--- a/science/ai/free/g4f-gpt4free.txt
+++ b/science/ai/free/g4f-gpt4free.txt
@@ -2,6 +2,8 @@ https://g4f.ai/
 https://github.com/xtekky/gpt4free
 
 2023
+https://habr.com/ru/articles/778620/
+    https://github.com/LORD-A-B/Telegram-bot-gpt4free
 PythonToday - Using ChatGPT for Free 0:00 of 5:14
     https://www.youtube.com/watch?v=kudfqsuq5E4
 TheParseHub - ChatGPT API free: turning context on 0:00 of 6:36