diff --git a/.gitmodules b/.gitmodules
new file mode 100644
index 0000000..5eb2e80
--- /dev/null
+++ b/.gitmodules
@@ -0,0 +1,3 @@
+[submodule "bsf"]
+	path = bsf
+	url = ssh://git@willipink.eu:3456/moritz/bsf.git
diff --git a/bsf b/bsf
new file mode 160000
index 0000000..5f59eec
--- /dev/null
+++ b/bsf
@@ -0,0 +1 @@
+Subproject commit 5f59eec0fc086b62d43f349e64689110a5f26a30