diff --git a/.gitmodules b/.gitmodules
new file mode 100644
index 0000000000000000000000000000000000000000..46d7092d35fa0c0987c93ea748d44de920dda96e
--- /dev/null
+++ b/.gitmodules
@@ -0,0 +1,6 @@
+[submodule "cryptobib"]
+	path = literature/cryptobib
+	url = https://github.com/cryptobib/export
+[submodule "rfcbib"]
+	path = literature/rfcbib
+	url = https://git.scc.kit.edu/TM/rfcbib.git
diff --git a/literature/cryptobib b/literature/cryptobib
new file mode 160000
index 0000000000000000000000000000000000000000..aed6f5e5ebf72076cae9422cceaff61b940a0f71
--- /dev/null
+++ b/literature/cryptobib
@@ -0,0 +1 @@
+Subproject commit aed6f5e5ebf72076cae9422cceaff61b940a0f71
diff --git a/literature/rfcbib b/literature/rfcbib
new file mode 160000
index 0000000000000000000000000000000000000000..b1941b650dd6c2a8e6baa14ac2c9bac7fde240bb
--- /dev/null
+++ b/literature/rfcbib
@@ -0,0 +1 @@
+Subproject commit b1941b650dd6c2a8e6baa14ac2c9bac7fde240bb