diff --git a/.gitmodules b/.gitmodules
index 8f70fff657cc8ab4d5228dbbd57b6f9ff7e84ad6..e44ee0cc7a95d551df61c94c8a1273667e0e5eb9 100644
--- a/.gitmodules
+++ b/.gitmodules
@@ -1,3 +1,9 @@
 [submodule "doc_module_vitis"]
 	path = doc_module_vitis
 	url = git@vm09.veremes.net:Documentation/doc_module_vitis.git
+[submodule "doc_module_gtf"]
+	path = doc_module_gtf
+	url = git@vm09.veremes.net:Documentation/doc_module_gtf.git
+[submodule "doc_module_studio"]
+	path = doc_module_studio
+	url = git@vm09.veremes.net:Documentation/doc_module_studio.git
diff --git a/doc_module_gtf b/doc_module_gtf
new file mode 160000
index 0000000000000000000000000000000000000000..0dec3c8f10aa63bba98ac6c2eb35876b6bbfef54
--- /dev/null
+++ b/doc_module_gtf
@@ -0,0 +1 @@
+Subproject commit 0dec3c8f10aa63bba98ac6c2eb35876b6bbfef54
diff --git a/doc_module_studio b/doc_module_studio
new file mode 160000
index 0000000000000000000000000000000000000000..d109cffd5a78645fe05faa9b6b84727f5e6d5ef4
--- /dev/null
+++ b/doc_module_studio
@@ -0,0 +1 @@
+Subproject commit d109cffd5a78645fe05faa9b6b84727f5e6d5ef4