diff --git a/.gitmodules b/.gitmodules
new file mode 100644
index 0000000000000000000000000000000000000000..0918d6889ae846920e8c68bbce82214d1930572a
--- /dev/null
+++ b/.gitmodules
@@ -0,0 +1,6 @@
+[submodule "doc_module_vitis"]
+	path = doc_module_vitis
+	url = http://vm09.veremes.net/Documentation/doc_module_vitis.git
+[submodule "doc_module_extraction"]
+	path = doc_module_extraction
+	url = http://vm09.veremes.net/Documentation/doc_module_extraction.git
diff --git a/doc_module_extraction b/doc_module_extraction
new file mode 160000
index 0000000000000000000000000000000000000000..d8e9918d7a81b39836f5e945d17c8a54fbbb0b21
--- /dev/null
+++ b/doc_module_extraction
@@ -0,0 +1 @@
+Subproject commit d8e9918d7a81b39836f5e945d17c8a54fbbb0b21
diff --git a/doc_module_vitis b/doc_module_vitis
new file mode 160000
index 0000000000000000000000000000000000000000..058f00a7ae7d2642b5b8e0a34679011d29f21297
--- /dev/null
+++ b/doc_module_vitis
@@ -0,0 +1 @@
+Subproject commit 058f00a7ae7d2642b5b8e0a34679011d29f21297