diff --git a/.gitmodules b/.gitmodules
new file mode 100644
index 0000000000000000000000000000000000000000..54d4afcda97795f447fa18470f930aed67aa82b3
--- /dev/null
+++ b/.gitmodules
@@ -0,0 +1,3 @@
+[submodule "documentation/manual"]
+	path = documentation/manual
+	url = https://git.overleaf.com/620142e0fbf7476b92f7240a
diff --git a/documentation/manual b/documentation/manual
new file mode 160000
index 0000000000000000000000000000000000000000..ee9445ff45a28f530ef9d9e952256bf3cbb8d18d
--- /dev/null
+++ b/documentation/manual
@@ -0,0 +1 @@
+Subproject commit ee9445ff45a28f530ef9d9e952256bf3cbb8d18d